USGS 23083-PC, Mouth of Nation River (Permian of the United States)

Where: Alaska (65.2° N, 141.7° W: paleocoordinates 43.4° N, 27.1° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Takhandit Formation, Wordian (266.9 - 264.3 Ma)

• Talus.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

Size class: macrofossils

Preservation: replaced with silica

Primary reference: E. E. Brabb and R. E. Grant. 1971. Stratigraphy and paleontology of the revised type section for the Takhandit Limestone (Permian) in east-central Alaska. United States Geological Survey Professional Paper 703:1-25 [M. Clapham/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 102598: authorized by Matthew Clapham, entered by Matthew Clapham on 17.01.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Spiriferida - Spiriferellidae
"Spiriferella cf. keilhavii" = Spiriferella keilhavii, "Spiriferella draschei" = Spiriferella keilhavii
"Spiriferella cf. keilhavii" = Spiriferella keilhavii von Buch 1847
"Spiriferella draschei" = Spiriferella keilhavii von Buch 1847
Strophomenata
 Orthotetida - Schuchertellidae
Arctitreta cf. kempei Andersson 1914
 Strophomenida - Rugosochonetidae
"Lissochonetes cf. spitzbergianus" = Dyoros (Dyoros) spitzbergianus
"Lissochonetes cf. spitzbergianus" = Dyoros (Dyoros) spitzbergianus Toula 1874