Sample Detail of
Sample: Sample No. 85ADn163A -- USGS No. 11318-SD
Locality: Field No. 85ADn163A
Description: Black, fine-grained dolostone from lat. 67o 03.8 min., long. 157o 02.5 min., Ambler River A-3 quadrangle.
Location: Alaska Quadrangle: Ambler River A-3
Lat.: 67o03.8 ' Long.: 157o02.5 '
Reference
Title: Report on Referred Fossils ,  1986 (03/06)
Report by: Anita G. Harris , Katharine S. Schindler
Referred by: Julie A. Dumoulin , Susan M. Karl
Age: Wenlockian-Ludlovian
CAI:Min: 5 (CAI=5 indicating host rock reached at least 300 deg. C.)
Comment:8.84 kg of rock was processed for conodonts (37 g of +20 mesh and 150 g of 20-200 mesh insoluble residue).

We feel confident that this collection is of Middle to Late Silurian, although we are not as confident about the taxonomic assignment of some of the conodonts, particularly S elements assigned to Pelekysgnathus?.

Age: Wenlockian through Ludlovian; (=Middle through early Late Silurian)
CAI=5 indicating host rock reached at least 300o C.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 129 Panderodus spP. elements
2 Conodonts Pelekysgnathus? n. sp. 1 Pa, 19 compressiform and 15 roundiform S elements
3 Conodonts 4 Pb, 1 M and 2 Sa elements of an ozarkodiniform apparatus
4 Conodonts 213 indet. bar, blade, platform and simple cone elements