Fields Creek, OR123C (Triassic of the United States)

Where: Grant County, Oregon (44.3° N, 119.3° W: paleocoordinates 11.0° N, 43.7° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Fields Creek Formation (Aldrich Mountains Group), Ladinian (242.0 - 237.0 Ma)

• near the base of the formation, Pseudostylosphaera magnispinosa assemblage

• bed-level stratigraphic resolution

Environment/lithology: basinal (siliceous); lithified chert

• black chert

Size class: microfossils

Primary reference: K. Y. Yeh. 1989. Studies of Radiolaria from the Fields Creek Formation, east-central Oregon, USA. Bulletin of the National Museum of Natural Science 1:43-109 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 96068: authorized by Wolfgang Kiessling, entered by Uta Merkel on 12.05.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Radiolaria
 Nassellaria -
 Nassellaria - Ultranaporidae
Silicarmiger "sp. A" Dumitrica et al. 1980 radiolarian
 Nassellaria - Ruesticyrtiidae
Triassocampe "sp. A" Dumitrica et al. 1980 radiolarian
Triassocampe sulovensis Kozur and Mock 1981 radiolarian
? Triassocampe cf. pulchra Kozur and Mostler 1981 radiolarian
Yeharaia "sp. A" Nakaseko and Nishimura 1979 radiolarian
Yeharaia elegans Nakaseko and Nishimura 1979 radiolarian
Yeharaia aff. elegans Nakaseko and Nishimura 1979 radiolarian
 Entactinaria - Eptingiidae
Pylostephanidium "sp. A" Dumitrica 1978 radiolarian
 Entactinaria -
Radium "sp. A" Yeh 1989 radiolarian
Radium "sp. B" Yeh 1989 radiolarian
Radium pessagnoi n. gen. n. sp. Yeh 1989 radiolarian
 Entactinaria - Hindeosphaeridae
Parasepsagon "sp. A" Dumitrica et al. 1980 radiolarian
Parasepsagon "sp. B" Dumitrica et al. 1980 radiolarian
Parasepsagon variabilis Nakaseko and Nishimura 1979 radiolarian
Pseudostylosphaera "sp. A" Kozur and Mostler 1981 radiolarian
Pseudostylosphaera "sp. B" Kozur and Mostler 1981 radiolarian
Pseudostylosphaera "sp. C" Kozur and Mostler 1981 radiolarian
Pseudostylosphaera magnispinosa n. sp. Yeh 1989 radiolarian
Pseudostylosphaera japonica Nakaseko and Nishimura 1979 radiolarian
 Spumellaria -