USGS 21749-PC, Yukon River-Nation River Confluence (Permian of the United States)

Where: Alaska (65.2° N, 141.7° W: paleocoordinates 43.4° N, 27.2° W)

• coordinate stated in text

• small collection-level geographic resolution

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

• Limestone Unit, 95 feet above base of unit

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

• Massive 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 102541: authorized by Matthew Clapham, entered by Matthew Clapham on 17.01.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Strophomenida - Rugosochonetidae
"Svalbardia sp." = Brachiosvalbardia
"Svalbardia sp." = Brachiosvalbardia Ceccolini and Cianferoni 2023
 Productida - Productidae
Yakovlevia mammata Keyserling 1846
Horridonia sp. Chao 1927
 Productida - Linoproductidae
Kuvelousia sphiva Waterhouse 1968
 Orthotetida - Derbyiidae
? Derbyia sp. Waagen 1884
Rhynchonellata
 Rhynchonellida - Rhynchoporidae
Rhynchopora sp. King 1865
 Spiriferida - Elythidae