Cuticle Coal Gray Shale (Carboniferous of the United States)

Where: Indiana (39.0° N, 87.0° W: paleocoordinates 8.7° S, 25.0° W)

When: Gray Shales Member (Block Coal Formation), Atokan (318.6 - 312.8 Ma)

• The above assignments are based on a correlation chart on pp.47-48 of the report (Fig. 1)

• group of beds-level stratigraphic resolution

Environment/lithology: "floodplain"; graded, micaceous, sideritic, gray, sandy shale

• These are interpreted as crevasee splay or flood deposits. Shales closer to stream level have in situ rooting horizons, and show vertical ?? changes that suggest gradual accumulation, or at least ?? through repeated that deposited various thicknesses of sediment.
• Gray shales are the dominant lithology in the Roaring Creek area. They are laterally persistent, bu subject to considerable thickness changes, from less than 10 ft to greater than 50 ft. Although no lateral facies relationships have been observed among gray shales and other lithologies, the shales do become more sandy and micaceous closer to sandstone fill channels. Some of the gray shales, particularly those in the upper Block Coal part of the section, are relatively coarse grained, fining upwards in places, and have little evidence of in situ floral remains.

Size class: macrofossils

Primary reference: W. A. DiMichele and G. Dolph. 1981. Compression floras of the Upper Mansfield/Lower Brazil and Upper Staunton Formation in Parke and Clay Counties, Indiana. Guidebook to Pennsylvanian Plant Localities, AIBS Field Trip No. 2. Indiana University Press, Bloomington, IN USA [H. Sims/S. Ostrowski]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 11198: authorized by Hallie Sims, entered by Summer Ostrowski on 23.07.2001, edited by Alistair McGowan

Creative Commons license: CC BY (attribution)

Taxonomic list

 Sphenophyllales -
 Radiatopses - Medullosaceae
  - Sphenopteridae
 Coniferales -
Samaropsis spp. Göppert 1864
 Cordaitanthales -
Cordaites sp. Unger 1850
Neuropteris heterophylla
"Neuropteris heterophylla" = Imparipteris heterophylla
"Neuropteris heterophylla" = Imparipteris heterophylla Brongniart 1825
 Equisetales - Equisetidae
 Hymenophyllales - Polypodiidae
 Filicinae -
Crossotheca sp. Zeiller 1883
 Lepidodendrales - Lepidodendraceae
Lepidodendron aculeatum Sternberg 1820
  - Sigillariaceae