Northwest ridge of Mt. Jura (Jurassic of the United States)

Where: California (40.1° N, 120.8° W: paleocoordinates 33.5° N, 60.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Nerinea thompsonensis other zone, Thompson Formation, Bajocian (170.3 - 168.3 Ma)

• Bajocian age based on Nerinea thompsonensis, which is Bajocian according to Sohl 1965 "Marine Jurassic Gastropods, Central and Southern Utah"

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, fine-grained tuff and lithified, gray, blue limestone

• fine, red, stratified marine tuff, with some thick lenses of pale blue-gray limestone

Size class: macrofossils

Reposited in the GSC

Primary reference: C. H. Crickmay. 1933. Attempt to Zone the North American Jurassic on the Basis of its Brachiopods. Geological Society America Bulletin 44:871-894 [M. Clapham/M. Manojlovic]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 164679: authorized by Matthew Clapham, entered by Marko Manojlovic on 10.12.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Terebratulida - Loboidothyrididae
Ptyctothyris phlegethontis n. sp.
Ptyctothyris phlegethontis n. sp. Crickmay 1933