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Crow Creek (Eocene of the United States)

Where: Saint Francis County, Arkansas (35.0° N, 90.7° W: paleocoordinates 35.6° N, 82.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Jackson Group, Priabonian (37.2 - 33.9 Ma)

• "broad correlation between the Crow Creek fauna and Uintan to Chadronian faunas in the continental interior", apparently from a bed < 1 m thick

•AEO estimate of 44.5 - 44.4 Ma (Lutetian) significantly conflicts with marine mammal biochronology

•Priabonian age after Weems et al 2004 (ref. 18945).

• group of beds-level stratigraphic resolution

Environment/lithology: estuary or bay; shelly/skeletal, gray, argillaceous, silty marl

• "intertidal conditions... coastal stream influences... hyposaline... estuarine"
• "silty to sandy marl that appears dark gray in fresh exposures and reddish-brown when weathered. Invertebrate remains often occur in excess of 50% of the sediment volume. Small percentages of clay are present."

Size classes: macrofossils, mesofossils

Collection methods: bulk, sieve,

Primary reference: K.V.W. Palmer. 1939. Basilosaurus in Arkansas. Bulletin of the American Association of Petroleum Geologists 23(8):1128-1129 [M. Uhen/M. Uhen/M. Uhen] more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 16549: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Mark Uhen

Creative Commons license: CC BY (attribution)