Hinchman Ravine, Curtice Cliff (Jurassic of the United States)

Where: California (40.1° N, 120.8° W: paleocoordinates 34.9° N, 62.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hinchman Formation, Callovian (166.1 - 163.5 Ma)

• The "coral zone" cited by the author is part of the Hinchman sandstone which has been revised to the Hinchman Formation. (Callovian) according to Imlay in "Jurassic paleobiogeography of the conterminous United States in its continental setting".

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, coarse-grained, tuffaceous sandstone

• coarse tuffaceous sandstone according to Diller (USGS Bulletin 353)

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 164637: authorized by Matthew Clapham, entered by Marko Manojlovic on 08.12.2014, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Trochoidea - Trochidae
Trochus hinchmanensis n. sp. Crickmay 1933 top snail
"100 yards southeast of Curtice Cliff"
Rhynchonellata
 Rhynchonellida - Rhynchonellidae
Ptilorhynchia plumasensis n. gen. n. sp. Crickmay 1933
 Rhynchonellida - Norellidae
Gnathorhynchia perplicata n. sp. Crickmay 1933
 Terebratulida - Zeilleriidae
Ornithella curticensis n. sp. Crickmay 1933
Ornithella gemina n. sp. Crickmay 1933