ammonites
Felch Quarry 1, Garden Park (YPM) (=Marsh Quarry; =Marsh-Felch Quarry) (Jurassic to of the United States)

Also known as CO-3, Marsh-Felch Quarry

Where: Fremont County, Colorado (38.5° N, 105.2° W: paleocoordinates 34.0° N, 52.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Brushy Basin Member (Morrison Formation), Kimmeridgian to Kimmeridgian (155.7 - 145.5 Ma)

• "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

• "river, lake, or estuary origin rather than consolidated beach sands"; "lower lacustrine unit, dominated by laminated mudstones and shales"; channel top-point bar in moderately drained floodplain. Most bones in upper channel lag, rather than lower point bar.
• "the bones are for the most part found in a very hard layer of sandstone, though they occasionally extend down for a short distance into the underlying clays." Sandstone described as "heavily bedded". Bones in a "coarse to gravelly, pale yellowish white sandstone." Sandstone body is broadly lenticular.

Size classes: macrofossils, mesofossils

Collected by H. 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 H. 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 Matt Carrano, entered by Matt Carrano on 10.02.2003

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)