Report on Referred Fossils |
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Stratigraphic range: |
Jurassic & Cretaceous |
Kinds of fossils: |
Mollusks |
Quadrangle or area: |
Talkeetna Mountains |
Shipment No.: |
A-52-22 |
Referred by: |
Grantz, Arthur
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Report prepared by: |
Imlay, Ralph W.
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Date: |
01/21/1953 |
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The collections from the Lower Jurassic show that most of the subperiod is represented. Lot 52AGz63 containing Arnioceras represents the lower part of the Sinemurian stage. Lot 52AGz66 contains ammonites that are slightly younger and represents either the upper Sinemurian or the lower Pliensbachian. The sharp-ventered Oxynoticeras in Europe ranges from the zone of Asteroceras obtusum to the zone of Prodactylioceras davosi. Ammonites with ribbing similar to Grammoceras are not known below the zone of Uptonia jamesoni. I suspect that lot 52AGz66 represents the lower Pliensbachian, but an exact age determination cannot be made with the material in hand. Lot 52AGz61 contains a fragmentary ammonite that is probably an Oxynoticeras and indicates an age similar to that of lot 52AGz66. Since the latter was obtained from beds that appeared to be lower stratigraphically than lot 52AGz63, there must be a fault within the Jurassic sequence that we did not detect. It seems unlikely that the sequence is completely overturned. One thing that needs to be determined in the field is whether the mass of volcanics forming the central part of Sheep Mountain is older or younger than Sinemurian. Establishment of this relationship should help in determining the structure of Sheep Mountain. Lots 52AGz92 and 52AGz253 represent the upper Toarcian and probably the zone of Lytoceras jurense as shown by the presence of Pseudogrammoceras and Phylseogrammoceras. Beds of this age have not hitherto been reported from Alaska. I hope that you can determine their stratigraphic position with respect to the Talkeetna-Tuxedni contact. Lot 52AGz98 contains well-preserved specimens of Haugia, which ammonite in Europe occurs in the Lytoceras jurense at the top of the Lower Jurassic and attains its greatest development in the lower part of that zone. It is interesting, therefore, that the field description notes that the specimens come from a siltstone that is transistional between the Talkeetna and Tuxedni formations. The collections from the Middle Jurassic of the Talkeetna Mountains and Matanuska Valley represents only three faunal zones whereas seven have been recognized in the Cook Inlet area. Whether failure to find the other zones may be explained by inadequate collecting, by structural complications, or by absence of sediments can be determined by future field work. The lowermost part of the Middle Jurassic is represented by lot 52AGz240. The two species of Erycites in this lot occur in the lowermost exposed beds of the Kialavik formation at Wide Bay in the Alaskan Peninsula where they are associated with the ammonite Tmetoceras. Lot 52AGz284 is probably of the same age as it contains an ammonite probably representing Pleydellia. In Europe this genus ranges through the zones of Lioceras opalinum and Ludwigia murchisonae but is most common at the base of the opalinum zone.
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User Note module to be added |
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52AGz11
(Mesozoic loc. 24105)
, Anchorage
, Recollection of 49AEC136 (Mes. loc. 22124) from 1.42 miles N 40 degrees E of B.M. 2649 (Glen West Base). About 122 road miles northeast of Anchorage. From tuffaceous shale, silts, and sands. Talkeetna formation. Anchorage D-2 quad. Collectors: R.D. Hoare, R.W. Imlay and Arthur Grantz, 1952.
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52AGz61
(Mesozoic loc. 24106)
, Anchorage
, Hoare, Imlay, and Grantz, 1952. Anchorage D-2 quad., on south tributary of Squaw Creek, 2.02 miles N 28 1/2 degrees E of southeast summit of Gunsight Mountain. Talkeetna formation.
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52AGz63
(Mesozoic loc. 24107)
, Anchorage
, Hoare, Imlay and Grantz, 1952. Anchorage D-2, on south tributary of Squaw Creek, 1.98 miles N 28 1/2 degrees E of southeast summit of Gunsight Mountain. Talkeetna formation. [R.D. Hoare, R.W. Imlay, and Arthur Grantz, 1952. On south tributary of Squaw Creek, 1.98 miles (3.2 km) N. 28 1/2 deg. E of southeast summit of Gunsight Mountain. Anchorage (D-2) quad. Talkeetna Mountains, southern Alaska. Talkeetna Formation. Late Pliensbachian. (description from Imlay, 1981, p. 26)]
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Arnioceras cf. A. semicostatum (Young & Bird)
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52AGz66
(Mesozoic loc. 24108)
, Anchorage
, Grantz, Hoare and Imlay, 1952. Anchorage D-2 quad., on south tributary of Squaw Creek, 1.91 miles N 28 1/2 degrees E. of southeast summit of Gunsight Mountain. Talkeetna formation. [Arthur Grantz, R.D. Hoare, and R.W. Imlay, 1952. Differs from USGS Mesozoic loc. 24107 by being 1.91 miles (3.1 km) N. 28 1/2 deg. E. of southeast summit of Gunsight Mountain. Late Pliensbachian (description from Imlay, 1981, p. 26)]
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Grammoceras? cf. G. antiquum Wright
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Oxynoticeras cf. O. wiltshirei Wright
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52AGz92
(Mesozoic loc. 24109)
, Talkeetna Mts
, Grantz, Hoare and Imlay, 1952. Talkeetna Mountains A-1 quad., Albert Creek, 3.15 miles N 75 W of its mouth. Talkeetna formation.
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Grammoceras (Pseudogrammoceras) sp.
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52AGz253
(Mesozoic loc. 24111)
, Anchorage
, Grantz, Hoare and Imlay, 1952. Anchorage D-2 quad., 5.04 miles N 33 degrees E of mouth of Sheep Creek. Talkeetna formation. [Arthur Grantz, R.D. Hoare, and R.W. Imlay, 1952. 5.04 miles (8 kms) N. 33 deg. E. of the mouth of Sheep Creek. Anchorage (D-2) quadrangle, Talkeetna Mountains, southern Alaska. Early Toarcian. (description from Imlay, 1981, p. 26)]
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Grammoceras (Phlyseogrammoceras?) sp.
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52AGz98
(Mesozoic loc. 24114)
, Talkeetna Mts
, Grantz, Hoare and Imlay, 1952. Talkeetna Mountains A-1 quad., north branch of North Creek, 1.61 miles N 45 degrees W of mouth of North Creek. Talkeetna formation, hard siltstone probably transitional into Tuxedni formation. [Arthur Grantz, R.D. Hoare, and R.W. Imlay, 1952. From north branch of North Creek, 1.61 miles (2.5 km) N. 45 deg. W. of its mouth. Talkeetna Mountains (A-1) quadrangle, southern Alaska. Talkeetna Formation. Late Toarcian (description from Imlay, 1981, p. 26)]
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Haugia aff. H. compressa Buckman
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52AGz85
(Mesozoic loc. 24113)
, Talkeetna Mts
, From landslide scar 1.63 miles north of mouth of Albert Creek. (from E&R report of R.W. Imlay, January 21, 1953) [Arthur Grantz, Richard Hoare, and R.W. Imlay, 1952. Talkeetna Mountains A-1 quad. From a landslide scar 1.63 mi (2.6 km) north of the mouth of Albert Creek. Tuxedni Group 200-250 ft (61-76 m) above base. (description from Imlay, 1984, USGS Prof. Paper 1322, p. 30)][Imlay, 1964, p. B22 provides following description: "Arthur Grantz, Richard Hoare, and R.W. Imlay, 1952. Talkeetna Mountains (A-1) quad. From a landslide scar 1.63 miles north of the mouth of Albert Creek. Tuxedni Formation, 50-250 ft above base."]; [24113 Arthur Grants, Richard Hoare and R. W. Imlay, 1952. Talkeetna Mountains A-1 quad., from a landslide scar 1.63 miles north of mouth of Albert Creek. Lower part of Tuxedni formation equivalent. (description from Imlay, 1961, p. 469)]
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Phylloceras (Holcophylloceras) sp.
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Phylloceras (Macrophylloceras) sp.
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Inoceramus lucifer Eichwald
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52AGz152
(Mesozoic loc. 24115)
, Talkeetna Mts
, North side of north branch of Little Nelchina River, 1.34 miles from the main headwater fork, Upper part of Tuxedni Formation.
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52AGz154
(Mesozoic loc. 24116)
, Talkeetna Mts
, North side of north branch of Little Nelchina River, 2.09 miles from the main headwater fork. Upper part of Tuxedni Formation.
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Hecticoceras (Prohecticoceras) sp.
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Inoceramus eximius Eichwald
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52AGz154A
(Mesozoic loc. 24117)
, Talkeetna Mts
, Same loality as 52AGz154 but on south side of stream. Upper part of Tuxedni Formation.
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Phylloceras (Holcophylloceras)
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52AGz155
(Mesozoic loc. 24118)
, Talkeetna Mts
, North side of north branch of Little Nelchina River, 2.27 miles from the main headwater fork, upper part of Tuxedni Formation.
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Gryphaea cf. G. impressi marginata McLearn
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52AGz198
(Mesozoic loc. 24120)
, Anchorage
, Caribou Creek, 0.62 miles east of mouth of Billy Creek. Lower part of Tuxedni Formation. (from Imlay E&R report of 1/21/53) [USGS Washington D.C. Mesozoic fossil locality register provides following description: "Tuxedni fm.-Jurassic-Alaska. About 1/2 mile SE of 24119. 0.62 miles east of Billy Creek."][Imlay, 1964, USGS Prof. Paper 318-B, p. B22 provides following description: "Arthur Grantz, Richard Hoare, and R.W. Imlay, 1952. Anchorage (D-2) quad., Caribou Creek 0.62 miles east of Billy Creek. Tuxedni Formaiton, upper siltstone."]
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Phylloceras (Macrophylloceras) sp.
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52AGz244
(Mesozoic loc. 24122)
, Anchorage
, 3.41 miles N 58 degrees E of mouth of Sheep Creek. Probably basal part of Tuxedni Formation. (from Imlay E&R report, 1/21/53)
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Inoceramus cf. I. lucifer Eichwald
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52AGz275
(Mesozoic loc. 24134)
, Anchorage
, 2.63 miles N 51 1/2 degrees E of mouth of Sheep Creek. Base of a siltstone member in the Tuxedni Formation. (description from Imlay E&R report of 01/21/1953)[Imlay, 1964, USGS Prof. Paper 318-B, p. B22, provides following description: "Arthur Grantz, Richard Hoare, and R.W. Imlay, 1952. Anchorage (d-2) quad., 2.63 miles N. 52 1/2 miles E. of mouth of Sheep Creek. Tuxedni Formation, base of upper siltstone".]
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52AGz286
, Anchorage
, 1150 feet S 5 1/2 W of mouth of Pass Creek on a southeast tributary of Alfred Creek. Basal sandstone of Tuxedni Formation.
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52AHr51
(Mesozoic loc. 24176)
, Anchorage
, Pass Creek, 0.35 miles above its mouth. Basal sandstone of Tuxedni Formation. (description from Imlay E&R report of 01/21/1953)[Imlay, 1964, p. B22 provides following description: "Richard Hoare, 1952. Anchorage (D-2) quad., Pass Creek, 0.35 mile above its mouth. Basal sandstone of the Tuxedni Formation, 100-200 ft. above base."]
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Inoceramus lucifer Eichwald
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Phylloceras (Holcophylloceras)
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52AGz158
(Mesozoic loc. 24140)
, Talkeetna Mts
, 0.74 miles S 52 degrees W of main headwater fork of Little Nelchina River.
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Cadoceras wosnessenskii (Grewingk)
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Cadoceras kialagvikense Imlay
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Cadoceras tenuicostatum Imlay
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Pseudocadoceras grewingki (Pompeckj)
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Phylloceras (Partschiceras) grantzi Imlay
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Phylloceras (Calliphyoceras) freibrocki Imlay
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52AGz159
(Mesozoic loc. 24141)
, Talkeetna Mts
, 0.83 miles S 58 1/2 degrees W of main headwater fork of the Little Nelchina River.
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Cadoceras (Paracadoceras) multiforme Imlay
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Cadoceras (Paracadoceras) tonniensis Imlay
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52AGz160
(Mesozoic loc. 24142)
, Talkeetna Mts
, 0.81 miles S 56 degrees W of main headwater fork of Little Nelchina River.
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Cadoceras (Paracadoceras) multiforme Imlay
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52AGz164
(Mesozoic loc. 24144)
, Talkeetna Mts
, North branch of Little Nelchina River, 3.96 miles from main headwater fork.
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Cadoceras wosnessenskii (Grewingk)
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52AGz166
(Mesozoic loc. 24145)
, Talkeetna Mts
, 0.99 miles S 65 1/2 degrees W of main headwater fork of Little Nelchina River.
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Cadoceras (Paracadoceras) tonniensis Imlay
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52AGz197
(Mesozoic loc. 24147)
, Anchorage
, North side of Caribou Creek 200 to 600 yards east of Billy Creek.
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Kheraiceras intermedium Imlay
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Kheraiceras abruptum Imlay
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Kepplerites mcevoyi (McLearn)
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Cadoceras (Paracadoceras) moffiti Imlay
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52AGz276
(Mesozoic loc. 24135)
, Anchorage
, 2.56 miles N 49 degrees E of mouth of Sheep Creek. Near top of lower third of a siltstone member.
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Kheraiceras abruptum Imlay
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52AHr22
(Mesozoic loc. 24151)
, Talkeetna Mts
, North bank of Little Nelchina River, 2.47 miles S 27 degrees W of 4610 ft. VABM Wal.
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Cadoceras (Paracadoceras) moffiti Imlay
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Xenocephalites hartsocki Imlay
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Kepplerites (Seymourites) mcevoyi (McLearn)
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52AGz100
(Mesozoic loc. 24152)
, Talkeetna Mts
, Elevation 4300 feet on northwest side of Horn Mountains 2.67 miles N 34 1/2 degrees W of mouth of North Creek.
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Aucella cf. A. spitiensis Holdhaus
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52AGz103
(Mesozoic loc. 24514)
, Talkeetna Mts
, East bank of Flat Creek, 0.87 miles S 14 1/2 degrees W of mouth. Quartz sandstone unit in Naknek Formation.
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Aucella mosquensis (Von Buch)
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52AGz114
(Mesozoic loc. 24155)
, Talkeetna Mts
, On south tributary of upper Tyone Creek, 1.98 miles N 7 1/2 degrees E of 4610 ft. VABM Wal.
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Aucella cf. A. bronni (Rouiller)
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52AGz116
(Mesozoic loc. 24156)
, Talkeetna Mts
, On south tributary of upper Tyone Creek, 2.23 miles N 11 1/2 degrees of 4610 ft. VABM Wal. (description from E&R report); Arthur Grantz, R. D. Hoare, and R. W. Imlay, 1952. Lat 62°10.0' N., long 147°22.0' W., Talkeetna Mountains (A-1). Quadrangle, southern Alaska. Lower (?) third of main siltstone and shale member of Naknek Formation. Early Oxfordian. (description from Imlay, 1981, USGS PP 1190, p. 24); [USGS Mesozoic Catalogue: pages containing this record and its neighbors are missing from Hand-written Catalogue.]
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Aucella bronni (Rouiller)
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52AGz118
(Mesozoic loc. 24157)
, Talkeetna Mts
, North bank of upper Tyone Creek, 1.68 miles S 9 degrees E of 4500 ft. VABM Ty.
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Aucella mosquensis (Von Buch)
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52AGz119
(Mesozoic loc. 24158)
, Talkeetna Mts
, On southwest tributary of Tyone Creek, 3.34 miles N 1 degree W of 4610 ft. VABM Wal.
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Aucella bronni (Rouiller)
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52AGz130
(Mesozoic loc. 24159)
, Talkeetna Mts
, 400 to 600 yds. above mouth of small south tributary of Little Nelchina River which enters 0.51 miles east of its main headwater fork. Lower half of Naknek siltstone member.
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Aucella bronni (Rouiller)
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52AGz133
(Mesozoic loc. 24160)
, Talkeetna Mts
, 0.75 miles S 64 1/2 degrees E of main headwater fork of Little Nelchina River. Lower half of Naknek siltstone member.
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Aucella cf. A. bronni (Rouiller)
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52AGz135
(Mesozoic loc. 24161)
, Talkeetna Mts
, 0.97 miles S 51 degrees E of main headwater fork of Little Nelchina River. Upper half of Naknek siltstone member.
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Aucella cf. A. bronni (Rouiller)
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52AGz136
(Mesozoic loc. 24162)
, Talkeetna Mts
, 1.0 miles S 48 1/2 degrees E of main headwater fork of Little Nelchina River. Naknek Formation, sandstone member. (description from E&R report); Arthur Grantz, R. D. Hoare. and R. W. Imlay, 1952. Lat 62°06.3' N., long 147°36.7' W., Talkeetna Mountains (A-2) Quadrangle, southern Alaska. Near top of main siltstone and shale member of Naknek Formation. Kimmeridgian to early Tithonian. (description from Imlay, 1981, USGS PP 1190, p. 24);[USGS Mesozoic Catalogue: pages containing this record and its neighbors are missing from Hand-written Catalogue.]
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52AGz138
(Mesozoic loc. 24163)
, Talkeetna Mts
, 1.07 miles S 42 1/2 degrees E of main headwater fork of Little Nelchina River. Naknek Formation, sandstone member.
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52AGz140
(Mesozoic loc. 24164)
, Talkeetna Mts
, 1.13 miles S 40 degrees E of main headwater fork of Little Nelchina River. Naknek Formation, sandstone member.
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Aucella mosquensis (Von Buch)
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52AGz146
(Mesozoic loc. 24165)
, Talkeetna Mts
, South side of Little Nelchina River, 1.32 miles below main headwater fork. Lowest fourth of Naknek Formation, siltstone member. (description from E&R report); USGS Mesozoic Iocs. 24165, 24166, 24168, 24837, and 24841. Near headwaters of Little Nelchina River in central and east-central part of Talkeetna Mountains A-2 quadrangle, Talkeetna Mountains, Cook Inlet region. Cardioceras (Scarburgiceras) martini Reeside and C. distans (Whitfield). (description from Imlay and Detterman, 1973, p. 25); [USGS Mes. Cat.: pages missing]; Arthur Grantz, R. D. Hoare, and R. W. Imlay. Lat 62°09.4' N., long 147°35.8' W., south side of Llttle Nelchina River, Talkeetna Mountains (A-2) Quadrangle. southern Alaska. Lower third of main siltstone and shale member of Naknek Formation. Early Oxfordian. (description from Imlay, 1981, USGS PP 1190, p. 24)
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Cardioceras martini Reeside
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Phylloceras (Calliphyoceras) sp.
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52AGz147
(Mesozoic loc. 24166)
, Talkeetna Mts
, North side of Little Nelchina River, 1.77 miles below main headwater fork. Lowest fourth of Naknek siltstone member. (description from E&R report); USGS Mesozoic locs. 24165, 24166, 24168, 24837, and 24841. Near headwaters of Little Nelchina River in central and east-central part of Talkeetna Mountains A-2 quadrangle, Talkeetna Mountains, Cook Inlet region. Cardioceras (Scarburgiceras) martini Reeside and C. distans (Whitfield).(description from Imlay and Detterman, 1973, p. 25); [USGS Mes. Cat.: pages missing]; Arthur Grantz, R. D. Hoare, and R. W. Imlay, 1952. Lat 62°07.5' N., long 147°35.0' W., on north side of Little Nelchina River. Talkeetna Mountains (A-2) Quadrangle, southern Alaska. Lower third of main siltstone and shale member of Naknek Formation. Early Oxfordian. (description from Imlay, 1981, USGS PP 1190, p. 24)
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52AGz149
(Mesozoic loc. 24167)
, Talkeetna Mts
, South side of north branch of Little Nelchina River, 0.43 miles from the main headwater fork. Lower half of siltstone member of Naknek Formation. (description from E&R report); Arthur Grantz. R. D. Hoare. and R. W. Imlay, 1952. Lat. 62°09.4' N., long 147°38.6' W., on north side of Little Nelchina River. Talkeetna Mountains (A-2) Quadrangle, southern Alaska. Lower third of main siltstone and shale member of Naknek Formation. Late middle to late Oxfordian. (description from Imlay, 1981, USGS PP 1190, p. 24); [USGS Mesozoic Catalogue: pages containing this record and its neighbors are missing from Hand-written Catalogue.]
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Aucella cf. A. bronni (Rouiller)
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52AGz163
(Mesozoic loc. 24168)
, Talkeetna Mts
, North branch of Little Nelchina River, 3.28 miles from main headwater fork. Lowest fourth of Naknek Formation, siltstone member. (description from E&R report); USGS Mesozoic locs. 24165, 24166, 24168, 24837, and 24841. Near headwaters of Little Nelchina River in central and east-central part of Talkeetna Mountains A-2 quadrangle, Talkeetna Mountains, Cook Inlet region. Cardioceras (Scarburgiceras) martini Reeside and C. distans (Whitfield). (description from Imlay and Detterman, 1973, p. 25); [USGS Mes. Cat.: pages missing]; Arthur Grantz, R. D. Hoare, and R. W. Imlay, 1952. 62°08.5' N., 147°44.3' W., Talkeetna Mountains (A-2) Quadrangle, southern Alaska. Near base of main siltstone and shale member of Naknek Formation. Early Oxfordian. (description from Imlay, 1981, USGS PP 1190, p. 24)
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Cardioceras martini Reeside
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52AHr21
(Mesozoic loc. 24169)
, Talkeetna Mts
, Near mouth of small north tributary of Little Nelchina River above Flat Creek. 2.09 miles S 2 1/2 degrees W of 4610 ft. VABM Wal.
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Aucella mosquensis (Von Buch)
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52AHr23
(Mesozoic loc. 24170)
, Talkeetna Mts
, North bank of Little Nelchina River, 2.56 miles above mouth of Idaho Creek.
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Aucella mosquensis (Von Buch)
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Aucella cf. A. bronni (Rouiller)
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52AHr27
(Mesozoic loc. 24171)
, Talkeetna Mts
, On a south tributary of Tyone Creek, 0.7 miles N 12 1/2 degrees W of 4610 ft. VABM Wal.
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Aucella bronni (Rouiller)
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52AHr28
(Mesozoic loc. 24172)
, Talkeetna Mts
, On a south tributary of Tyone Creek, 1.31 miles N 53 degrees E of 4610 ft. VABM Wal.
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Aucella mosquensis (Von Buch)
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52AHr29
(Mesozoic loc. 24173)
, Talkeetna Mts
, On a south tributary of Tyone Creek. 1.55 miles N 56 degrees E of 4610 ft. VABM Wal.
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Aucella mosquensis (Von Buch)
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52AHr30
(Mesozoic loc. 24174)
, Talkeetna Mts
, On a south tributary of Tyone Creek, 2.13 miles N 66 1/2 degrees E of 4610 ft. VABM Wal.
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Aucella mosquensis (Von Buch)
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52AHr39
(Mesozoic loc. 24175)
, Talkeetna Mts
, 3.53 miles N 80 1/2 degrees W of main headwater fork of Little Nelchina River. Ammonite from float above this locality. Aucellas in place.(description from E&R report); R. D. Hoare, 1952. Lat. 62°07.49' N., long 147°44.7' W., Talkeetna Mountains (A-2) Quadrangle, southern Alaska. Middle third of main siltstone and shale member of Naknek Formation. Buchia concentrica (Sowerby) found in place. Ammonites occur as float derived from higher beds. Late Oxfordian to early Kimmeridgian. (description from Imlay, 1981, USGS PP 1190, p. 24); [USGS Mesozoic Catalogue: pages containing this record and its neighbors are missing from Hand-written Catalogue.]
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Aucella cf. A. bronni (Rouiller)
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52AGz106
(Mesozoic loc. 24182)
, Talkeetna Mts
, 550 feet downstream from loc. 52AGz105 which is on north tributary of Little Nelchina River entering one mile above mouth of Flat Creek at a point 1.08 miles S 10 E 4610 ft. VABM Wal. From top foot of Nelchina Limestone.
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52AGz109
(Mesozoic loc. 24185)
, Talkeetna Mts
, 350 feet downstream from loc. 52AGz105. From cross-bedded sandstone overlying the Nelchina Limestone.
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Belemnopsis cf. B. gerardi (Oppel)
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52AGz141
(Mesozoic loc. 24183)
, Talkeetna Mts
, About 1 1/2 miles S 30 degrees E of main headwaters fork of Little Nelchina River. Float on weathered surface of Nelchina Limestone.
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Belemnopsis cf. B. gerardi (Oppel)
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52AGz171
(Mesozoic loc. 24186)
, Talkeetna Mts
, 3.45 miles S 21 1/2 degrees E of main headwater fork of Little Nelchina River.
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Aucella crassicollis Keyserling
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52AGz13
(Mesozoic loc. 24187)
, Anchorage
, From talus and cliff, east wall of canyon 3.75 miles up Granite Creek. From black shale and claystone near top of the shaly lower half of the Matanuska Formation.
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52AGz18
(Mesozoic loc. 24188)
, Anchorage
, On south tributary of Squaw Creek, 1.95 miles N 40 degrees W of southeast summit of Gunsight Mountain. From basal sandstone member of Matanuska Formation. [Jones, 1967, p. 17 gives following description: A. Grantz, R. Hoare, R. Imlay, 1952. Anchorage D-2 quad. On south tributary of Squaw Creek, 1.95 miles N. 40 deg. W. of southeast summit of Gunsight Mountain. Unit B]
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Inoceramus cf. I. uwajimensis Yehara
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52AGz20
(Mesozoic loc. 24189)
, Anchorage
, On south tributary of Squaw Creek, 2.01 miles N 40 1/2 degrees W of southeast summit of Gunsight Mountain. Near base of shale and siltstone member of the Matanuska Formation. [Jones, 1967, p. 17 gives following description: A. Grantz, R. Hoare, R. Imlay, 1952. Anchorage D-2 quad. On south tributary of Squaw Creek, 2.01 miles N. 40.5 deg. W. of southeast summit of Gunsight Mountain. Unit C-1]
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Inoceramus cf. I. uwajimensis Yehara
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52AGz23
(Mesozoic loc. 24190)
, Anchorage
, On south tributary of Squaw Creek, 2.06 miles N 41 degrees W of southeast summit of Gunsight Mountain. Near base of shale and siltstone member of Matanuska Formation.
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52AGz25
(Mesozoic loc. 24191)
, Anchorage
, On south tributary of Squaw Creek, 2.40 miles N 44 degrees W of southeast summit of Gunsight Mountain. From lime concretion in lower third of shale and siltstone member of the Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. On south tributary of Squaw Creek, 2.06 miles N. 41 degrees W. of southeast summit of Gunsight Mountain, lat. 61 deg. 52.2' N., long. 147 deg. 30.9' W. Lower part of member 3 of Matanuska formation. Campanian. Inoceramus schmidti zone.]
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Inoceramus undulato-plicatus Roemer
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52AGz26
(Mesozoic loc. 24192)
, Anchorage
, From shale 50 feet downstream from 52AGz25. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Inlay, 1952. Same locality as 24191, but 50 feet downstream. Lower part of member 3 of Matanuska formation. Campanian. Inoceramus schmidti zone.]
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Inoceramus undulato-plicatus Roemer
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52AGz28
(Mesozoic loc. 24193)
, Anchorage
, On south tributary of Squaw Creek, 2.67 miles N 40 degrees W of southeast summit of Gunsight Mountain. From lower third of shale and siltstone member of Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 19052. On south tributary of Squaw Creek, 2.67 miles N. 40 deg. W. of southeast summit of Gunsight Mountain, lat. 61 deg. 52.5' N., long. 147 deg. 31.0' W. Lower part of member 3 of Matanuska formation. Campanian. Inoceramus schmidti zone.]
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Inoceramus undulato-plicatus Roemer
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Anomia cf. A. vancouverensis Gabb
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52AGz30
(Mesozoic loc. 24194)
, Anchorage
, On south tributary of Squaw Creek. 2.77 miles N 39 1/2 degrees W of southeast summit of Gunsight Mountain. From lower third of shale and siltstone member of the Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. On south tributary of Squaw Creek, 2.77 miles N. 39.5 deg. W. of southeast summit of Gunsight Mountain, lat. 61 deg. 52.6' N., long. 147 deg. 31.0' W. Lower part of member 3 of Matanuska formation. Campanian. Inoceramus schmidti zone.]
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Inoceramus undulato-plicatus Roemer
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Anomia cf. A. vancouverensis Gabb
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52AGz32
(Mesozoic loc. 24195)
, Anchorage
, On south tributary to Squaw Creek, 2.99 miles N 40 degrees W of southeast summit of Gunsight Mountain. From lower third of shale and siltstone member of the Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. South tributary of Squaw Creek, 2.99 miles N. 40 deg. W. of southeast summit of Gunsight Mountain, lat. 61 deg. 52.7' N., long. 147 deg. 31.3' W. Lower part of member 3 of Matanuska formation. Campanian. Inoceramus schmidti zone.]
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Inoceramus undulato-plicatus Roemer
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Anomia cf. A. vancouverensis Gabb
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52AGz34
(Mesozoic loc. 24196)
, Anchorage
, On south tributary of Squaw Creek, 3.16 miles N 41 degrees W of southeast summit of Gunsight Mountain. From lower part of middle third of shale and siltstone member of the Matanuska Formation.
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Inoceramus undulato-plicatus Roemer
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52AGz37
(Mesozoic loc. 24198)
, Anchorage
, On north tributary of Squaw Creek, 1.45 miles S 16 1/2 degrees W of 5471 ft. VABM Fred. From upper part of middle third of shale and siltstone member of the Matanuska Formation.
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52AGz48
(Mesozoic loc. 24199)
, Anchorage
, On north tributary of Squaw Creek, 0.92 miles S 9 1/2 degrees W of 5471 ft. VABM Fred. From upper third of shale and siltstone member of the Matanuska Formation.
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Inoceramus cf. I. sagensis Owen
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52AGz50
(Mesozoic loc. 24200)
, Anchorage
, On north tributary of Squaw Creek, 0.92 to 1.04 miles S 9 1/2 degrees W of 5471 ft. VABM Fred. From upper third of shale and siltstone member of the Matanuska Formation.
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52AGz51
(Mesozoic loc. 24201)
, Anchorage
, On north tributary of Squaw Creek, 1.04 miles S 10 degrees W of 5471 ft. VABM Fred. From shelly glauconitic zone. Lower part of upper third of shale and siltstone member of the Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. On north tributary of Squaw Creek, about 3.1 miles northeast of junction of Squaw Creek and Caribou Creek, at altitude of 4,000 feet. Lat. 61 deg. 54.4' N., long 147 deg. 31.7' W. Upper part of member 3 of Matanuska formation. Late Campanian or Maestrichtian. Pachydiscus kamishakensis zone.]
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Pachydiscus cf. P. sucianesis (Meek)
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cf. Smilotrochus vancouverensis Whiteaves
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52AGz55
(Mesozoic loc. 24203)
, Anchorage
, On south tributary of Squaw Creek, 2.47 miles N 24 degrees E of southeast summit of Gunsight Mountain. Near base of shale and siltstone member of the Matanuska Formation. [Jones, 1967, p. 17 gives following description: A. Grantz, R. Hoare, R. Imlay, 1952. Anchorage D-2 quad. On south tributary of Squaw Creek, 2.47 miles N. 24 deg. E. of southeast summit of Gunsight Mountain. Unit C-1]
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Inoceramus cf. I. uwajimensis Yehara
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52AGz58
(Mesozoic loc. 24204)
, Anchorage
, On south tributary of Squaw Creek, 2.25 miles N 26 degrees E of southeast summit of Gunsight Mountain. Basal sandstone member of the Matanuska Formation. [Jones, 1967, p. 17 gives following description: A. Grantz, R. Hoare, R. Imlay, 1952. Anchorage D-2 quad. On south tributary of Squaw Creek, 2.25 miles N. 26 deg. E. of southeast summit of Gunsight Mountain. Unit B]
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Inoceramus cf. I. uwajimensis Yehara
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52AGz59
(Mesozoic loc. 24205)
, Anchorage
, From talus at same locality of 52AGz58 [Jones, 1967, p. 17 gives following description: A. Grantz, R. Hoare, R. Imlay, 1952. From talus, same locality as 24204. Unit B]
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Inoceramus cf. I. uwajimensis Yehara
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Inoceramus cf. I. naumanni Yokoyama
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52AGz68
(Mesozoic loc. 24206)
, Anchorage
, On south tributary of Squaw Creek, 1.50 miles N 30 1/2 degrees E of southeast summit of Gunsight Mountain. Basal sandstone of Matanuska Formation. [Jones, 1967, p. 17 gives following description: A. Grantz, R. Hoare, R. Imlay, 1952. Anchorage D-2 quad, south tributary of Squaw Creek, 1.50 miles N. 30.5 deg. E. of southeast summit of Gunsight Mountain. Unit B]
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Inoceramus cf. I. uwajimensis Yehara
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Inoceramus cf. I. naumanni Yokoyama
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52AGz70
(Mesozoic loc. 24207)
, Anchorage
, On north tributary of Squaw Creek, 2.45 miles S 59 1/2 degrees E of 5471 ft. VABM Fred. Upper third of shale and siltstone member of the Matanuska Formation.
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Inoceramus subundatus Meek
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52AGz71
(Mesozoic loc. 24208)
, Anchorage
, 150 feet upstream from loc. 52AGz70. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. Squaw Creek valley, 4.9 miles northeast of junction of Squaw Creek and Caribou Creek, at altitude of about 3,500 feet, lat. 61 deg. 54.2' N., long. 147 deg. 27.5' W. Upper part of member 3 of Matanuska formation. Late Campanian or Maestrichtian. Pachydiscus kamishakensis Zone.]
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cf. Polyptychoceras obstrictum (Jimbo)
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Inoceramus cf. I. sagensis Owen
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52AGz72
(Mesozoic loc. 24209)
, Anchorage
, From float 150 feet upstream from loc. 52AGz70. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. Squaw Creek valley, 4.9 miles northeast of junction of Squaw Creek and Caribou Creek. Upper part of member 3 of Matanuska formation. Late Campanian or Maestrichtian. Pachydiscus kamishekensis zone.]
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Gaudryceras denmanense Whiteaves
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52AGz75
(Mesozoic loc. 24210)
, Anchorage
, North tributary of Squaw Creek, from float 2.41 miles S 63 E degrees from 5471 ft. VABM Fred. From upper third of shale and siltstone member of Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. Squaw Creek valley, 4.95 miles northeast of junction of Squaw Creek and Caribou Creek; altitude 3,500 feet. Lat. 61 deg. 54.3' N., long. 147 deg. 27.5' W. Upper part of member 3 of Matanuska formation. Late Campanian or Maestrichtian. Pachydiscus kamishakensis zone.]
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Pachydiscus sucianesis Meek
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Nostoceras hornbyense (Whiteaves)
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Inoceramus subundatus Meek
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52AGz76
(Mesozoic loc. 24211)
, Anchorage
, On north tributary of Squaw Creek, 2.41 miles S 67 1/2 degrees E from 5471 ft. VABM Fred. From upper third of shale and siltstone member of the Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. Squaw Creek valley, 5.1 miles northeast of junction of Squaw Creek and Caribou Creek, altitude about 3,700 feet. Lat. 61 deg. 54.45' N., long. 147 deg. 27.4' W. Upper part of member 3 of Matanuska formation. Late Campanian or Maestrichtian. Pachydiscus kamishakensis zone.]
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Pachydiscus sucianesis Meek
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52AGz80
(Mesozoic loc. 24212)
, Anchorage
, From float 2000 feet upstream from loc. 52AGz76. From upper part of upper third of shale and siltstone member of the Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. Squaw Creek valley, float about 2,000 feet upstream from locality 24211. Upper part of member 3 of Matanuska formation. Late Campanian or Maestrichtian. Pachydiscus kamishakensis zone.]
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52AGz83
(Mesozoic loc. 24213)
, Anchorage
, From south tributary of Squaw Creek, 1.44 miles N 7 degrees W of southeast summit of Gunsight Mountain. From shale in the sandstone member at base of the Matanuska Formation.
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52AGz177
(Mesozoic loc. 24214)
, Anchorage
, Alfred Creek, 1250 feet west of Bench Creek, from shale and siltstone member of the Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. Alfred Creek, about 0.8 mile east of mouth of Flume Creek. Lat. 61 deg. 57.1' N., lat. 147 deg. 31.9' W. Upper part of Matanuska formation Late Campanian or Maestrichtian. Pachydiscus kamishakensis zone.]
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52AGz182
(Mesozoic loc. 24215)
, Anchorage
, Alfred Creek, 0.8 miles east of Papoose Creek, from shale and siltstone member of the Matanuska Formation (description from Imlay, 1953 E&R report) [Imlay, 1964, USGS Prof. Paper 418-B, p. B-22 provides following description: "Richard Hoare and Arthur Grantz, 1952. Anchorage (D-2) quad., Alfred Creek, 0.8 mile east of Papoose Creek. Tuxedni Formation, upper siltstone."]
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Prohauericeras cf. P. goupilianum
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Inoceramus cf. I. uwajimensis Yehara
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52AGz183
(Mesozoic loc. 24216)
, Anchorage
, 400 feet south of Alfred Creek on tributary which enters 1-21 miles east of Papoose Creek. Near base of shale and siltstone member of the Matanuska Formation.
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52AGz184
(Mesozoic loc. 24217)
, Anchorage
, North bank of Alfred Creek at junction with Caribou Creek. From lower half of shale and siltstone member of the Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. North bank of Alfred Creek at junction with Caribou Creek. Lower part of member 3 of Matanuska formation. Late Campanian or Maestrichtian. Pachydiscus kamishakensis zone.]
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Pachydiscus cf. P. catarinae Anderson & Hanna
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52AGz185A
(Mesozoic loc. 24218)
, Talkeetna Mts
, 7.34 miles S 19 degrees W of main headwater fork of Little Nelchina River. From siltstone member of the Matanuska Formation.
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52AGz200
(Mesozoic loc. 24219)
, Anchorage
, North tributary of Squaw Creek. 2.52 miles S 71 degrees E of 5471 ft. VABM Fred. From talus under upper 300 feet of shale and siltstone member of the Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. Squaw Creek valley, 5.3 miles northeast of junction of Squaw Creek and Caribou Creek, at altitude of 3,900 feet. Lat. 61 deg. 54.55' N., long. 147 deg. 27.0' W. Upper part of member 3 of Matanuska formation. Late Campanian or Maestrichtian. Pachydiscus kamishakensis zone.]
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Inoceramus cf. I. simpsoni Meek
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52AGz237
(Mesozoic loc. 24222)
, Anchorage
, 1.94 miles N 49 1/2 degrees E of mouth of Sheep Creek on its largest eastern tributary. From upper part of shale and siltstone member of the Matanuska Formation.
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52AGz239
(Mesozoic loc. 24223)
, Anchorage
, 4.21 miles N 19 1/2 degrees E of mouth of Sheep Creek. From shale and siltstone member of the Matanuska Formation.
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52AGz254
(Mesozoic loc. 24227)
, Talkeetna Mts
, 7.77 miles S 6 1/2 degrees E of main headwater fork of Little Nelchina River. From siltstone member of the Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "Grantz, Hoare, Imlay, 1952. 7.77 miles S. 6.5 deg. E. of main headwater fork of Little Nelchina River. Lat. 62 deg. 0.5' N., long. 147 deg. 36.5' W. Upper part of member 3 of Matanuska formation. Late Campanian or Maestrichtian. Pachydiscus kamishakensis zone.]
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Schluteria selwyniana (Whiteaves)
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Neophylloceras ramosum (Meek)
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Inoceramus cf. I. subundatus Meek
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52AGz266
(Mesozoic loc. 24239)
, Anchorage
, South side of Alfred Creek 1.22 miles S 55 degrees W of mouth of Pass Creek. From lower fourth of shale and siltstone member of Matanuska Formation. [Note by RBB: Jones, 1962, USGS Prof. Paper 432, p. 18 states: "A. Grantz, 1952. On south side of Alfred Creek, 3.22 miles N. 86 deg. E. of mouth of Flume Creek. Upper part of member 3 of Matanuska formation. Late Campanian or Maestrichtian. Pachydiscus kamishakensis zone.] [Jones, 1967, USGS Prof. Paper 547, p. 17 describes locality as follows: A. Grantz, 1952. Anchorage D-2 quad., on south side of Alfred Creek, 1.22 miles S. 55 deg. W. of mouth of Pass Creek. Unit C-1]
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52AGz295
(Mesozoic loc. 24228)
, Anchorage
, West side of Caribou Creek, 400 feet above mouth of east tributary which enters about 0.65 miles south of Squaw Creek. From shale and siltstone member of the Matanuska Formation.
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52AGz303
(Mesozoic loc. 24240)
, Anchorage
, On the north side of the Matanuska Glacier 2.5 miles southeast of the mouth of Caribou Creek, probably lower fourth of shale and siltstone member of the Matanuska Formation.
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52AHr1
(Mesozoic loc. 24229)
, Anchorage
, Borrow pit on north side of Glenn Highway at mile 120.25. Near base of shale and siltstone member of the Matanuska Formation. [Jones, 1967, p. 17 gives following description: R. Hoare, 1952. Anchorage D-1 quad., borrow pit on north side of Glenn Highway at mile 120.25. Unit C-1]
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Parapuzosia cf. P. gaudama (Forbes)
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Inoceramus cf. I. naumanni Yokoyama
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Inoceramus cf. I. incertus Jimbo
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Inoceramus cf. I. iburiensis Nagao and Matumoto
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52AHr5
(Mesozoic loc. 24231)
, Anchorage
, North side of Glenn Highway at mile 118.94. Near base of the shale and siltstone member of the Matanuska Formation. [Jones, 1967, p. 17 gives following description: R. Hoare, 1952. Anchorage D-1 quad., north side of Glenn Highway at mile 118.94. Unit C-1]
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Inoceramus cf. I. uwajimensis Yehara
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52AHr6
(Mesozoic loc. 24232)
, Anchorage
, Same locality as 52AHr5 but at a different level. [Jones, 1967, p. 17 gives following description: R. Hoare, 1952. Same locality as 24231. Unit C-1]]
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Inoceramus cf. I. uwajimensis Yehara
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52AHr7
(Mesozoic loc. 24233)
, Anchorage
, On south tributary of Squaw Creek. 2.02 miles N 60 1/2 degrees W of southeast summit of Gunsight Mountain. Basal sandstone of the Matanuska Formation. [Jones, 1967, p. 17 gives following description: R. Hoare, 1952. Anchorage D-2 quad., south tributary of Squaw Creek, 2.02 miles N. 60.5 deg. W. of southeast summit of Gunsight Mountain. Unit B]
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Inoceramus cf. I. uwajimensis Yehara
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