Quarry 4, Como Bluff (YPM) (Jurassic to of the United States)

Also known as Truckstop Quarry, WY-40

Where: Albany County, Wyoming (41.9° N, 106.0° W: paleocoordinates 37.5° N, 52.1° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Brushy Basin Member (Morrison Formation), Kimmeridgian to Kimmeridgian (157.3 - 145.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: wet floodplain; gray, silty claystone

• poorly drained floodplain

Size class: macrofossils

Collected by W. Reed in 1879; reposited in the YPM

Collection methods: quarrying, mechanical,

Primary reference: J. H. Ostrom and J. S. McIntosh. 1999. Marsh's Dinosaurs: The Collections from Como Bluff. Yale University Press, New Haven 1-388 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 39342: authorized by Matthew Carrano, entered by Matthew Carrano on 26.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Saurischia - Diplodocidae
Barosaurus sp. Marsh 1890 diplodocine
Apatosaurus sp. Marsh 1877 diplodocid
 Saurischia -
Camarasaurus sp. Cope 1877 sauropod
 Avetheropoda - Allosauridae
"Antrodemus valens" = Allosaurus fragilis
"Antrodemus valens" = Allosaurus fragilis Marsh 1877 allosaurid
 Ornithischia - Stegosauridae
Stegosaurus sp. Marsh 1877 ornithischian