Also known as CO-3, Marsh-Felch Quarry, Marsh Quarry, Oil Creek

Where: Fremont County, Colorado (38.5° N, 105.2° W: paleocoordinates 34.3° N, 52.7° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Brushy Basin Member (Morrison Formation), Late/Upper Kimmeridgian to Late/Upper Kimmeridgian (155.7 - 145.0 Ma)

• Recent radiometric dates for several Garden Park localities suggest an approximate age of 152 Ma for the quarry (Trujillo and Kowallis, 2015; Whitlock et al., 2018)

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•"The bone-bearing horizon is not more than 3 feet thick vertically", and is "about 150 feet above the red Triassic sandstones". 47.9 m above base of Morrison (J5 unconformity), w/in upper portion of 16 m thick interval contianing four sandstone bodies. Quarry in sandbody 4, with bones in two distinct layers.

• group of beds-level stratigraphic resolution

Environment/lithology: "channel"; lithified, lenticular, coarse-grained, white, yellow sandstone and claystone

Size classes: macrofossils, mesofossils

Collected by S. & M. Felch, J. B. Hatcher, & Utterback in 1877–1903; reposited in the CM, UNSM, YPM

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

• discovered 1869 or 1870 by Sarah Felch, but not learned of by Marsh until 1877. 1877-1884, Marsh; 1900-1903 Carnegie Museum, Hatcher & Utterback

Primary reference: O. C. Marsh. 1878. Principal characters of American Jurassic dinosaurs. Part I. American Journal of Science and Arts 16:411-416 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 28366: authorized by Matthew Carrano, entered by Matthew Carrano on 10.02.2003, edited by David Nicholson and Philip Mannion

Creative Commons license: CC BY (attribution)