USGS 21742-PC, Nation River (Permian of the United States)

Where: Alaska (65.4° N, 141.4° W: paleocoordinates 43.4° N, 26.8° W)

• coordinate stated in text

• small collection-level geographic resolution

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

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, gray limestone

• Thinly bedded dark gray limestone

Size class: macrofossils

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 102524: authorized by Matthew Clapham, entered by Matthew Clapham on 16.01.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Strophomenida - Anopliidae
"Chonetina" sp.
"Chonetina" sp. Krotow 1888
 Productida - Linoproductidae
"Cancrinella" sp., ? Linoproductus sp., Megousia sp.
Megousia sp. Muir-Wood and Cooper 1960
 Productida - Productidae
? Yakovlevia sp.
? Yakovlevia sp. Fredericks 1925
 Productida - Productellidae
"Krotovia" sp.
"Krotovia" sp. Fredericks 1928
Rhynchonellata
 Spiriferida - Elythidae
Permophricodothyris sp.
 Rhynchonellida - Rhynchoporidae
Rhynchopora sp.
Rhynchopora sp. King 1865