Something Interesting Quarry (SI), unit 1 (Jurassic to of the United States)

Also known as Warm Springs Ranch

Where: Hot Springs County, Wyoming (43.6° N, 108.2° W: paleocoordinates 39.5° N, 53.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

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

• tracks associated with bone quarry, but at 3 levels in total within this unit 1

• group of beds-level stratigraphic resolution

Environment/lithology: wet floodplain; bioturbated, concretionary, volcaniclastic, shelly/skeletal, gray, carbonaceous mudstone and gray, argillaceous mudstone

• "a 40-cm-thick, heavily trampled, light gray (N6) carbonate mudstone...The matrix is dominantly Ca-Mg smectite with a minor component of bioclasts and volcanic airfall ash material including zircons, plagioclase, and minor amounts of olivine. Darker gray, clay-rich (5GY4/1) mudstone infills the lowest levels of undulations in the trampled surface. Barite nodules are closely packed around bone material...The nodules have a granular texture with sparry calcite in dilational fractures."

Size classes: macrofossils, mesofossils, microfossils

Preservation: mold/impression, trace, replaced with calcite

Collection methods: quarrying, surface (in situ), mechanical,

Primary reference: P. Watkins, D. Gray, T. Ikejiri and B. Pohl. 2005. Warm Springs Ranch dinosaur quarries from the upper Morrison Formation of north central Wyoming. Journal of Vertebrate Paleontology 25(3, suppl.):128A [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 55320: authorized by Anna Behrensmeyer, entered by Matthew Carrano on 08.10.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Ostracoda indet. Latreille 1802 ostracod
Bivalvia indet. Linnaeus 1758 clam
Gastropoda indet. Cuvier 1797 snail
 Saurischia -
Sauropoda indet. sauropod
juvenile footprints
 Saurischia - Diplodocidae
Diplodocus sp. Marsh 1878 diplodocine
Apatosaurus sp. Marsh 1877 diplodocid
 Saurischia - Camarasauridae
Camarasaurus sp. Cope 1877 camarasaurid
 Theropoda -
Theropoda indet. theropod
 Avetheropoda - Allosauridae
Allosauridae indet. Marsh 1878 allosaurid