Winchell Fm., Lake Brownwood Spillway, TX TMM slab 1967TX101 (Carboniferous of the United States)

Where: Texas (31.8° N, 99.0° W)

• Paleocoordinates: 6.2° S, 33.5° W (Wright 2013)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Winchell Formation (Canyon Group), Kasimovian (307.0 - 303.7 Ma)

Environment/lithology: estuary or bay; lithified, black shale

• Abundant leaf fossils, highly abundant leaf and wood debris, high amounts of silt, and laminated structure indicate still water and proximity to the paleoshoreline, such as a protected bay or estuary.
• hannel-shaped, finely laminated, black shale ranging in thickness from 0.5 m on the edges of the locality to 1.5 m in the middle of the Spillway. Pteridosperm and lycopsid leaves as well as abundant unidentified carbonized wood fragments are present in some horizons, and leaf debris coats nearly all bedding planes.

Preservation: original calcite

Reposited in the TMM

Collection methods: quarrying, mechanical,

• these are single spectacular slabs

Primary reference: C. L. Schneider, J. Sprinkle, and D. Ryder. 2005. PENNSYLVANIAN (LATE CARBONIFEROUS) ECHINOIDS FROM THE WINCHELL FORMATION, NORTH-CENTRAL TEXAS, USA. Journal of Paleontology 79(4):745-762 [S. Peters/S. Peters]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 66108: authorized by Shanan Peters, entered by Shanan Peters on 28.09.2006

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Spiriferida - Ambocoeliidae
Crurithyris sp.
Crurithyris sp. George 1931
Stenolaemata
 Trepostomata -
Trepostomata indet.
Trepostomata indet. Ulrich 1882
Bryozoa
 Fenestellida -
Fenestellida indet.
Echinoidea
  - Archaeocidaridae
Archaeocidaris brownwoodensis n. sp.
 Perischoechinoidea - Lepidocentridae
Elliptechinus kiwiaster n. gen. n. sp.
Elliptechinus kiwiaster n. gen. n. sp. sea urchin