Loc. 3. USGS 15301. Bear Creek at Sulphur Springs Hollow, AR SH-27 (Carboniferous of the United States)

Also known as USGS Locs: 15302-PC, 15939-PC, 16260-PC, 28556-PC. ~18.5 km sw of Marshall

Where: Searcy County, Arkansas (35.8° N, 92.8° W: paleocoordinates 12.3° S, 34.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Imo Formation, Serpukhovian (330.9 - 323.2 Ma)

• Elvirian (E2b-c). Appx 10 m above base of fm. JA: late Chesterian is Serpukhovian according to Mii et al. 1999 (GSA Bull 111:960-973)

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, concretionary, black, gray, sandy grainstone and shale

• "The environment of deposition...relatively shallow water, low energy offshore area undergoing slow continuous deposition of terrigenous clay with periodic higher-energy incursions of carbonate sediments."
• ...as much as 104 m of dark-gray to black, fissile, clay shale w/ numerous, large, bright-red, orange, or brown concretions. ...the lower 36 m...contains thin limestones, sandstones, and conglomerates.

Reposited in the USGS

Primary reference: R. D. Hoare, M. J., I.I.I. Heaney, and R. H. Mapes. 1989. Bivalves (Mollusca) from the Imo Formation (Mississippian, Chesterian) of North-Central Arkansas. Journal of Paleontology 63(5):582-603 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 5518: authorized by John Alroy, entered by Mike Sommers on 08.10.1999, edited by Pete Wagner and Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

• Crinoids, bryozoans, brachiopods, bivalves, corals, nautiloids also present.
Show authors, comments, and common names
Anthozoa
 Stauriida - Hapsiphyllidae
Amplexizaphrentis maneri n. sp.3
Amplexizaphrentis maneri n. sp.3 horn coral
 Stauriida - Antiphyllidae
? Bradyphyllum lesliense n. sp.3
? Bradyphyllum lesliense n. sp.3 horn coral
Gastropoda
 Bellerophontida - Euphemitidae
Euphemites whirligigi2
Euphemites whirligigi2 Jeffery et al. 1994 snail
 Bellerophontida - Bellerophontidae
Retispira cincta2, Retispira yochelsoni2, Bellerophon (Bellerophon) welshi2
Retispira cincta2 Gordon and Yochelson 1987 snail
Retispira yochelsoni2 Jeffery et al. 1994 snail
Bellerophon (Bellerophon) welshi2 Gordon and Yochelson 1987 snail
 Euomphalina - Euomphalidae
Straparollus (Euomphalus) konobasis2, Straparollus (Euomphalus) variabilis2, "Straparollus (Euomphalus) intermedius" = Amphiscapha intermedius2
Straparollus (Euomphalus) konobasis2 Jeffery et al. 1994 snail
Straparollus (Euomphalus) variabilis2 Jeffery et al. 1994 snail
"Straparollus (Euomphalus) intermedius" = Amphiscapha intermedius2 Gordon and Yochelson 1983 snail
 Caenogastropoda - Strobeidae
Globozyga mediocris2
Globozyga mediocris2 Jeffery et al. 1994 snail
 Murchisoniina - Gosseletinidae
Glabrocingulum (Glabrocingulum) coronulum2, Glabrocingulum (Glabrocingulum) parasolum2
Glabrocingulum (Glabrocingulum) parasolum2 Jeffery et al. 1994 snail
 Murchisoniina - Lophospiridae
"Worthenia (Yochelsonospira) tenuilineata" = Yochelsonospira tenuilineata2
"Worthenia (Yochelsonospira) tenuilineata" = Yochelsonospira tenuilineata2 Girty 1929 snail
Cephalopoda
 Goniatitida - Anthracoceratidae
Anthracoceras paucilobum1
Anthracoceras paucilobum1 Phillips 1836 ammonite
 Goniatitida - Glaphyritidae
"Cravenoceras miseri" = Stenoglaphyrites miseri1
"Cravenoceras miseri" = Stenoglaphyrites miseri1 Gordon 1964 ammonite
 Pseudorthocerida - Spyroceratidae
Reticycloceras croneisi1, Euloxoceras angustius1
Euloxoceras angustius1 Gordon 1964
Bivalvia
 Trigoniida - Schizodidae
Schizodus chesterensis
Schizodus chesterensis Meek and Worthen 1860 clam
 Carditida - Astartidae
Astartella cf. concentrica
 Cardiidia - Grammysiidae
Prothyris (Lophoprothyris) crista, ? Sphenotus sp.
Prothyris (Lophoprothyris) crista Hoare et al. 1989 clam
? Sphenotus sp. Hall 1884 clam
 Pholadomyida - Edmondiidae
Edmondia sp.
Edmondia sp. de Koninck 1841 clam
 Nuculanida - Polidevciidae
Phestia sp.
Phestia sp. Chernyshev 1951 clam
 Nuculida - Nuculidae
Nuculopsis "sp. A"
Nuculopsis "sp. A" Girty 1912 nut clam
1Gordon 1964; 2Jeffery et al. 1994; 3Webb and Sutherland 1993