JO 90, Volcanic member Josephine ophiolite (Jurassic of the United States)

Where: California (42.0° N, 123.8° W: paleocoordinates 33.3° N, 63.9° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Volcanic Member (Josephine Formation), Bajocian (170.3 - 168.3 Ma)

• Zone 1H. Age re-assigned based on Baumgartner et al. (1995).

•Informal Formation name. Stated as Volcanic member, Josephine Ophiolite

• bed-level stratigraphic resolution

Environment/lithology: basinal (siliceous); lithified, tuffaceous chert

• Smith River Subterrane
• Tuffaceous cherts within upper basalt member of Josephine Ophiolite

Size class: microfossils

Preservation: original silica

Collection methods: chemical, hydroflouric,

Primary reference: E. A. Pessagno, Jr., C. D. Blome, D. M. Hull and W. M. Six. 1993. Jurassic radiolaria from the Josephine ophiolite and overlying strata, Smith River subterrane (Klamath Mountains), northwestern California and southwestern Oreg. Micropaleontology 39:93-166 [W. Kiessling/W. Kiessling/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 51635: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 09.06.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Protozoa
 Nassellaria - Parvicingulidae
Ristola sp., "Praecaneta sp." = Praeparvicingula, "Praecaneta decora" = Praeparvicingula decora
Ristola sp. Pessagno and Whalen 1982 radiolarian
"Praecaneta sp." = Praeparvicingula Pessagno et al. 1993 radiolarian
"Praecaneta decora" = Praeparvicingula decora Pessagno and Whalen 1982 radiolarian
 Nassellaria - Spongocapsulidae
Spongocapsula sp. Pessagno 1977 radiolarian
 Nassellaria - Williriedellidae
? Tricolocapsa sp. Haeckel 1881 radiolarian
"Quarkus madstonensis" = Williriedellum madstonense Pessagno et al. 1993 radiolarian
 Nassellaria - Ultranaporidae
Napora sp. Pessagno 1977 radiolarian
 Nassellaria - Hsuidae
Hsuum baldfacense radiolarian
Hsuum sp. Pessagno 1977 radiolarian
Semihsuum sp. Pessagno et al. 1993 radiolarian
 Nassellaria - Eucyrtidiidae
Stichocapsa aff. convexa Yao 1979 radiolarian