Snowshoe Formation, Oregon, USA (Locality 523) (Jurassic of the United States)

Where: Oregon (44.0° N, 119.5° W: paleocoordinates 34.8° N, 59.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Snowshoe Formation, Bajocian (170.3 - 168.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; gray mudstone and black lime mudstone

• dark gray mudstone with common limestone nodules. sample from large, black calcilutite nodule

Size class: microfossils

Primary reference: E. A. Pessagno, Jr. and C.D. Blome. 1980. Upper Triassic and Jurassic Pantanelliinae from California, Oregon, and British Columbia. Micropaleontology 26(3):225-273 [A. Miller/K. Layou/D. Schramm]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 32744: authorized by Arnold Miller, entered by Karen Layou on 14.07.2003, edited by Adam Kocsis

Creative Commons license: CC BY (attribution)

Taxonomic list

• Abundance data given as rare (1-2 specimens); common (3-5 specimens); and abudant (6+ specimens). Data recorded as 1, 3, 6 specimens for rare, common, and abundant, respectively.
Show authors, comments, and common names
Protozoa
 Actinommacea - Xiphostylidae
Xiphostylus spp.1, Archaeocenosphaera spp.1
Xiphostylus spp.1 Haeckel 1881 radiolarian
Archaeocenosphaera spp.1 Pessagno et al. 1989 radiolarian
 Nassellaria - Hsuidae
Hsuum belliatulum2
Hsuum belliatulum2 Pessagno and Whalen 1982 radiolarian
 Spumellaria - Pantanelliidae
Pantanellium vigrassi, Pantanellium sp., Pantanellium sincerum, Trillus seidersi, Zartus dickinsoni, Zartus imlayi, Zartus jurassicus
Pantanellium sp. Pessagno 1977 radiolarian
Pantanellium sincerum Pessagno and Blome 1980 radiolarian
Trillus seidersi radiolarian
Zartus dickinsoni radiolarian
Zartus imlayi radiolarian
Zartus jurassicus Pessagno and Blome 1980 radiolarian
1Pessagno et al. 1989; 2Pessagno and Whalen 1982