This report covers 5 collections from Rookery Island in Duncan Canal. unfortunately, none of the fossil material is well-enough preserved for generic identification. Most of the fossils occur as molds (holes-in-the-rock) with no shell material preserved. The shapes of the large bivalves are not like any I have seen in the Permian of southeastern Alaska. The presence of a possible spongiomorph, Heterastridium?, and possible monotids makes it likely that this is Upper Triassic, but nothing positively identifiable is present to support this opinion. The material has been discarded, as you requested, except for 79DB171F.