USGS 8836, Bostwick Inlet, Gravina Island (Triassic of the United States)

Also known as G.C.M.-8

Where: Alaska (55.2° N, 131.7° W: paleocoordinates 0.0° S, 70.9° W)

• coordinate based on nearby landmark

When: Nehenta Formation, Lacian (221.5 - 215.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, nodular limestone

• Angular nodules in a brecciated, nodular limestone.

Size class: macrofossils

Collected by Martin, Overbeck in 1914; reposited in the USNM

Primary reference: J. P. Smith. 1927. Upper Triassic marine invertebrate faunas of North America. United States Geological Survey Professional Paper 141:1-262 [D. Bottjer/C. Powers/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 112253: 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.
Show authors, comments, and common names
Rhynchonellata
 Spiriferinida - Spiriferinidae
? Spiriferina sp.
? Spiriferina sp. d'Orbigny 1847
 Terebratulida - Terebratulidae
"Terebratula" sp.
"Terebratula" sp. Müller 1776
Cephalopoda
 Ceratitida - Arcestidae
? Arcestes sp.
? Arcestes sp. Suess 1865 ceratite
Bivalvia
 Nuculida - Nuculidae
"Nucula" sp.
"Nucula" sp. Lamarck 1799 nut clam
 Pectinida - Plicatulidae
? Plicatula sp.
? Plicatula sp. Lamarck 1801 scallop
 Pectinida - Pectinoidae
"Pecten" sp.
"Pecten" sp. Müller 1776 scallop
 Ostreida - Cassianellidae
Cassianella gravinaensis n. sp.
Cassianella gravinaensis n. sp. Smith 1927 oyster
Cassianella sp. in Buddington & Chapin
 Trigoniida - Trigoniidae
? Trigonia sp.
? Trigonia sp. Bruguière 1789 clam
 Trigoniida - Myophoriidae
Myophoria beringiana n. sp.
Myophoria beringiana n. sp. Smith 1927 clam
Myophoria sp. in Buddington & Chapin
 Carditida - Astartidae
? Astarte sp.
? Astarte sp. Sowerby 1816 clam