Sample Detail of
Sample: Sample No. 82-CC-75 -- USGS No. 10861-SD
Locality: Field No. 82-CC-75
Description: Small limestone pebbles in Lower Cretaceous conglomerate from lat. 63o 21 min. 48 sec., long. 149o 38 min. 43 sec., Healy B-4 quad.
Location: Alaska Quadrangle: Healy B-4
Lat.: 63o21'48 " Long.: 149o38'43 "
Reference
Title: Report on Referred Fossils ,  1984 (04/25)
Report by: Anita G. Harris
Referred by: Chris Carlson
Age: Silurian-Early Devonian
Formation: Unnamed (Unnamed Lower Cretaceous conglomerate)
CAI:Min: 4.5 - Max: 5 (CAI=4-1/2 to 5 indicating host rock reached 250 to 300 deg. C.)
Comment:1.46 kg of rock was processed (61 g of +20 mesh insoluble residue) and yielded: (see faunal list)

AGE: Silurian to Early Devonian (based on overlapping ranges of the conodonts and the acrotretid brachiopod)
CAI=4-1/2 to 5 indicating host rock reached 250 to 300o C.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 1 Belodella devonica (Stauffer) s.f.
2 Conodonts 1 Belodella triangularis (Stauffer) s.f.
3 Conodonts 1 Panderodus sp.
4 Conodonts 5 indet. bar and blade fragments of post-Ordovician morphotype
5 Brachiopods 1 pedicle valve of an acrotretid brachiopod