Riggs Quarry 14, Fruita (FMNH) (Jurassic of the United States)

Where: Mesa County, Colorado (39.1° N, 108.7° W: paleocoordinates 34.5° N, 54.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Salt Wash Member (Morrison Formation), Kimmeridgian (157.3 - 152.1 Ma)

• described as "upper Como Beds"

• bed-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; green, red, blue claystone and green shale

• "variegated clays...alternation between green and purplish bands does not mark andy variation in the nature of hardness of these massive joint clays. There are frequent layers of clay nodules, sometimes calcareous, and a few ledges of nodular gray sandstone which are confined to limited areas. Occasional thick ledges of cross-bedded sandstone and lenticular masses of greenish sand occur at almost all levels, but these are likewise of limited extent. Near the top...the clays take on a more sandy nature." (Riggs 1901)

Size class: macrofossils

Collected by E. S. Riggs in 1900; reposited in the FMNH

Collection methods: quarrying, mechanical,

Primary reference: E. S. Riggs. 1901. The fore leg and pectoral girdle of Morosaurus, with a note on the genus Camarosaurus. Field Columbian Museum Publication 63, Geological Series 1(10):275-281 [M. Carrano/M. Carrano/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 11925: authorized by Matthew Carrano, entered by Matthew Carrano on 19.09.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

 Saurischia - Camarasauridae
Camarasaurus supremus Cope 1877 camarasaurid
FMNH P-6641