Evansville Mtn - west side Hwy 59 (Loc. 11) (Carboniferous of the United States)

Where: Washington County, Arkansas (35.8° N, 94.5° W: paleocoordinates 8.7° S, 32.1° W)

• coordinate stated in text

When: Branneroceras branneri ammonoid zone, Woolsey Member (Bloyd Formation), Morrowan (323.2 - 318.6 Ma)

• In the type area the Woolsey has a thickness between 30 and 45 feet. The locality 11 shale is slightly above the Brentwood Limestone.

Environment/lithology: marine; limestone and ferruginous shale

• The Woolsey Member of the Bloyd Formation was proposed by Henbest (1953, p. 1943) for exposures near Woolsey, Washington County, Arkansas, and a type section was designated by Henbest (1962a, p. 40) on the south and east side of Bloyd Mountain, i.e., from center E 1/2 sec. 3 to center north side sec. 4, T. 14 N., R. 30 W. In the type area the Woolsey has a thickness between 30 and 45 feet.

Size class: macrofossils

Collected by Moore and Strimple; Rowett and Sutherland; reposited in the OU, SUI

Primary reference: R. C. Moore and H. L. Strimple. 1973. Lower Pennsylvanian (Morrowan) crinoids from Arkansas, Oklahoma, and Texas. University of Kansas Paleontological Contributions, Echinodermata Article 60(12):1-84 [G. Webster/G. Webster]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 128978: authorized by John Alroy, entered by Briony Mamo on 19.06.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Crinoidea
 Cladida - Diphuicrinidae
Diphuicrinus croneisi
Diphuicrinus croneisi Moore and Plummer 1938 Sea lily
 Dendrocrinida - Laudonocrinidae
Anchicrinus planulatus
Anchicrinus planulatus Moore and Strimple 1973 Sea lily
Found 1ft below top of Brentwood Lm
 Dendrocrinida - Cromyocrinidae
Paracromyocrinus oklahomensis
Paracromyocrinus oklahomensis Moore and Plummer 1938 Sea lily
 Dendrocrinida - Arkacrinidae
Arkacrinus dubius
Arkacrinus dubius Mather 1915 Sea lily