Sample Detail of
Sample: Sample No. 69ADt26
Locality: Field No. 69ADt26
Description: Tributary of Ivishak River, 15.5 miles S. 30o W of Cashe One Lake. Concretions in black, silty, ferruginous shale; position in section unknown.
Location: Alaska Quadrangle: Mt Michelson
Lat.: 69o06' " Long.: 147o43' "
Reference
Title: Report on Referred Fossils ,  1969 (11/17)
The following of your collections from the Ivishak Member of the Sadlerochit Formation were forwarded to me by Tom Dutro.
Report by: Norman J. Silberling
Referred by: Robert L. Detterman
Age: Early Triassic
Formation: Ivishak Formation
Occurrence(s)
No. Group Name Qty Notes
1 Ammonoids Ophiceras commune Spath This is the index ammonite of the Commune Zone of late Griesbachian age.