USGS M5095, M5909 Bostwick Inlet, Gravina Island (Triassic of the United States)

Where: Alaska (55.2° N, 131.7° W: paleocoordinates 0.1° N, 70.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Chapin Peak Formation, Norian (228.0 - 208.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified limestone and lithified volcaniclastic

• limestone beds and limestone clasts in volcanic breccia

Size class: macrofossils

Preservation: cast, mold/impression

Primary reference: H. C. Berg. 1973. Geology of Gravina Island, Alaska. United States Geological Survey Bulletin 1373:1-41 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 101051: authorized by Wolfgang Kiessling, entered by Uta Merkel on 15.12.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Cardiida - Cardiidae
Septocardia sp.
Septocardia sp. Hall 1877 cockle
 Modiomorphida - Palaeopharidae
Palaeopharus cf. buriji
Palaeopharus cf. buriji Kiparisova 1954 clam
 Pholadomyida - Pholadomyidae
? Goniomya sp.
? Goniomya sp. Agassiz 1842 clam
 Trigoniida - Trigoniidae
Trigoniidae indet., Minetrigonia cf. cairnesi, Minetrigonia cf. suttonensis
Trigoniidae indet. Lamarck 1819 clam
Minetrigonia cf. suttonensis Clapp and Shimer 1911 clam
 Ostreida - Pinnidae
Pinna sp.
Pinna sp. Linnaeus 1758 oyster
 Ostreida - Cassianellidae
Cassianella sp.
Cassianella sp. Beyrich 1862 oyster
 Ostreida - Bakevelliidae
"Gervilleia sp." = Gervillia
"Gervilleia sp." = Gervillia Defrance 1820 oyster
 Pectinida - Plicatulidae
Plicatula cf. perimbricata
Plicatula cf. perimbricata Gabb 1870 scallop
 Pectinida - Propeamussiidae
""Variamussium" sp." = Parvamussium
""Variamussium" sp." = Parvamussium Sacco 1897 mud scallop
Cephalopoda
 Ceratitida - Haloritidae
? Halorites sp.
? Halorites sp. Mojsisovics 1879 ceratite
 Ceratitida - Cycloceltitidae
Cycloceltites cf. arduini
 Ceratitida - Arcestidae
Arcestes sp.
Arcestes sp. Suess 1865 ceratite
 Ceratitida - Gymnitidae
Placites sp.
Placites sp. Mojsisovics 1896 ceratite