Mud mounds, route 219, Edray (Carboniferous of the United States)

Where: Pocahontas County, West Virginia (38.3° N, 80.1° W: paleocoordinates 15.6° S, 24.4° W)

• coordinate estimated from map

When: Lillydale Shale Member (Bluefield Formation), Chesterian (335.5 - 323.2 Ma)

• mounds located in the lowermost portion of the Bluefield Fm. of the Mauch Chunk Group, in what was named the Lillydale Shale Member by Reger and Price

Environment/lithology: limestone

• these mud mounds were formed in the presence of terrigenous sedimentation. The mud mounds are overlain and underlain by dark green sandy shales. The green shale above the mounds contains numerous, thin, ripple-marked sandstones. The flanks of the mound unit are overlain by a thin packstone containing fragments of crinoids, bryozoans, and brachiopods.
• earthy, fossiliferous (mostly fenestellid bryozoans) limestone; lithic components in the mounds consist of quartz silt, terrigenous clay, ooids, and lime mud; individual mounds vary in size with the smallest being 0.1 m high to 0.3 m wide and the largest 1.2 m high to 1.5 m wide. The mound lithofacies often grade laterally into one another.

Size class: macrofossils

• fenestrate bryozoans, brachiopods, crinoids, and the blue-green cyanophyte Girvanella.

Primary reference: C.C. Christopher. 1990. Late Mississippian Girvanella-Bryozoan mud mounds in Southern West Virginia. Palaios 5:460-471 [B. Seuss/B. Seuss]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 211795: authorized by Barbara Seuss, entered by Barbara Seuss on 28.07.2020

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Brachiopoda indet., Foraminifera indet.
Hormogoneae
 Oscillatoriales - Girvanellaceae
Girvanella sp.
Girvanella sp. Nicholson and Etheridge 1878
Stenolaemata
 Fenestrata -
Fenestrata indet.
Fenestrata indet. Elias and Condra 1957
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily