77-ADt-169
(Mesozoic loc. M6926)
, Chignik
, Chignik (D-1) Quadrangle. Latitude 56 deg. 50 min. 29 sec. N; Longitude 158 deg. 12 min. 50 sec. W. Section 5, T. 39 S., R. 56 W., 3.7 miles S 40 deg. W of Vent Mountain. Naknek Formation, dark siltstone with thin sandstone interbeds.
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Buchia concentrica (Sowerby)
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77-ADt-192
(Mesozoic loc. M6927)
, Chignik
, Chignik (D-1) Quadrangle. Latitude 56 deg. 54 min. 34 sec. N; Longitude 158 deg. 04 min. W. Section 8, T. 38 S., R. 55 W., north gate to Aniakchak Caldera. 1 mile S 75 deg. E of outlet to Surprice Lake. Naknek Formation, siltstone.
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Buchia concentrica (Sowerby)
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