UO 2201-1, Grindstone-Twelvemile Creek area (Permian of the United States)

Where: Harney County, Oregon (44.0° N, 119.8° W: paleocoordinates 19.8° N, 36.1° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Coyote Butte Formation, Kungurian (279.3 - 272.3 Ma)

• Mesogondolella idahoensis and N. pequopensis suggest Kungurian age (Wardlaw et al., 1982)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; limestone and sandstone

• Sandstone beds are widespread but poorly exposed in the Coyote Butte Formation, limestone lenses are olive-grey, crinoidal fusulinid limestones in lower part of formation; Purer, finer-grained, deep-olive in colour and better bedded in the upper part with rarer fusulinids and common brachiopods.

Size class: macrofossils

Primary reference: G. A. Cooper. 1957. Permian brachiopods from central Oregon. Smithsonian Miscellaneous Contributions 134(12):1-79 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40961: authorized by David Bottjer, entered by Matthew Clapham on 04.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Productida - Echinoconchidae
"Echinoconchus inexpectatus n. sp." = Calliprotonia inexpectatum
"Echinoconchus inexpectatus n. sp." = Calliprotonia inexpectatum Cooper 1957
 Productida - Productellidae
Krotovia pustulata Keyserling 1853
 Productida - Productidae
 Productida - Linoproductidae
Anidanthus minor n. sp. Cooper 1957
Rhynchonellata
 Terebratulida - Dielasmatidae
Dielasma rectimarginatum n. sp. Cooper 1957
 Spiriferinida - Punctospiriferidae
 Spiriferida - Martiniidae
"Pseudomartinia aff. semiglobosa" = Tiramnia semiglobosa
"Pseudomartinia aff. semiglobosa" = Tiramnia semiglobosa Tschernyschew 1902
 Spiriferida - Reticulariidae
"Squamularia rostrata" = Bajkuria rostrata
"Squamularia rostrata" = Bajkuria rostrata Kutorga 1842
 Rhynchonellida - Rhynchoporidae
Rhynchopora magna Cooper 1957