West coast of Gravina Island - 9531 (Triassic of the United States)

Also known as 15 ACh 111

Where: Alaska (55.1° N, 131.8° W: paleocoordinates 0.1° S, 70.9° W)

• coordinate based on nearby landmark

When: Late/Upper Triassic (237.0 - 201.3 Ma)

Environment/lithology: lithified limestone and lithified, massive conglomerate

• Limestone overlying massive conglomerate.

Size class: macrofossils

Collected by T. Chapin in 1915

Primary reference: A. F. Buddington and T. Chapin. 1929. Geology and mineral deposits of southeastern Alaska. United States Geological Survey Bulletin 800:1-398 [A. Miller/S. Kolbe]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 112238: authorized by Arnold Miller, entered by Sarah Kolbe on 07.07.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• Identified by T.W. Stanton.
Anthozoa
  -
Anthozoa indet. Ehrenberg 1834
Bivalvia
 Ostreida - Gryphaeidae
? Gryphaea sp. Lamarck 1801 oyster
 Ostreida - Ostreidae
? Ostrea sp. Linnaeus 1758 oyster
 Pectinida - Pectinoidae
Pecten sp. Müller 1776 scallop
Gastropoda
 Sorbeoconcha - Naticidae
? Natica sp. Scopoli 1777 moon snail
 Cerithioidea - Turritellidae
? Turritella sp. Lamarck 1799 turret shell
Echinoidea
  -
Echinoidea indet. Leske 1778 sea urchin