of
Sample: Sample No. 82ABe601-A -- USGS No. Mesozoic loc. D12059
Locality: Field No. 82ABe601-A
Description: Black limestone and calcareous siltstone; stream west of Porpcupine Lake; Lat. 68o 46' 30" N., Long. 146o 36'30" W.
Location: Alaska Quadrangle: Arctic D-5
Lat.: 68o46'30 " Long.: 146o36'30 "
Reference
Title: Report on Referred Fossils ,  1982 (12/29)
This report treats all six collections originally listed on your request form dated 8/2/82, including the lost collection 82ABe601-B that was resubmitted with your request dated 8/9/82 as collection 82ATr12-B-1.
Report by: Norman J. Silberling
Referred by: William P. Brosge
Age: Middle Triassic-Cretaceous (Middle Triassic or younger)
Comment:This scrap of a flattened ammonite is characterized by projected, bifurcating ribs. It is younger than the Lower Triassic and could be a Middle Triassic beyrichitid, an Upper Triassic tropitacid, or even a post-Triassic form.
Occurrence(s)
No. Group Name Qty Notes
1 Ammonoids scrap of a flattened ammonite