of
Sample: Sample No. 79DB171A
Locality: Field No. 79DB171A
Description: Calcareous schistose grit with shale chips and pebbles and some black chert pebbles; Permo-Triassic(?). Collector: D.A. Brew, 1979.
Location: Alaska Quadrangle: Petersburg C-4
Township&Range: T60S R77E Section: Sec. 1
Lat.: 56o41'28 " Long.: 133o12'05 "
Reference
Title: Report on Referred Fossils ,  1980 (10/06)
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.
Report by: J. Thomas Dutro , Jr.
Referred by: David A. Brew
Age: No Data
Comment:The collection contains only outline traces of large bivalved molluscs; no shell is preserved and the holes are indeterminate.
Occurrence(s)
No. Group Name Qty Notes
1 Bivalves outline traces of large bivalved molluscs