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Shipment No.: A-71-9M, A-17-13M
Referred by: Tailleur, Irv L.
Report prepared by: Silberling, Norman J.
Date: 11/17/1971

Mr. Irvin L. Tailleur
Alaskan Mineral Resources Branch
U.S. Geological Survey

Dear Irv:

My conclusions regarding the following three of your collections from the De Long Mountains and Pt. Hope quads are: [see comments below]

Specimens from all three of these localities have been added to the Triassic reference collections of the P&S Branch in Menlo Park, and the unwanted scraps from collections -35 have been returned to the Alaskan Branch. It would be interesting to have these processed for conodonts. Either L.C. Mosher at Univ. Arizona or Walter Sweet and his associates at Ohio State might be approached to do this.

Many thanks for the materials on radiometric dates for the Triassic that you had duplicated for me, and for the other Xerox copies, too.

User Note module to be added
71-ATr-35 , Point Hope , Supplemental collection for M2546-M2549. 2' of black platy limestone in 4-5' black shale zone at, or very nearly so, base of upper 80' of measured section (i.e. 75-77' level). Revised interpretation of section puts top of Siksikpuk at 80', top of Tupik at 147'.
"Posidonia" sp.
71-ATr-48 , De Long Mts , Isolated, unique exposure of Shublik in J-K terrane; rubble only. Rocks has dark, phosphatic aspect of "black Shublik" in NE regions but fossils seem somewhat different from Monotis common in NE black facies. Possibly black limestone interbeds from normal chert-shale member.
Halobia of H. zitteli-H. ornatissima kind
71-ATr-49 , De Long Mts , Cobble from gravel at Cp. Beaufort camp, likely Cenozoic origin. Fragments look like Monotis but red chert not known to be matrix for definite Monotis Shublik.
Monotis cf. M. subcircularis