Loc. 3. USGS 15301. Bear Creek at Sulphur Springs Hollow, AR SH-27: Serpukhovian, Arkansas

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Goniatitida - Anthracoceratidae
Anthracoceras paucilobum (Phillips 1836)
Gordon 1964
original and current combination Goniatites paucilobus
(2 measurements)
Cephalopoda - Goniatitida - Glaphyritidae
Cravenoceras miseri Gordon 1964
Gordon 1964
recombined as Stenoglaphyrites miseri
Cephalopoda - Pseudorthocerida - Spyroceratidae
Reticycloceras croneisi Gordon 1960
Gordon 1964
Euloxoceras angustius Gordon 1964
Gordon 1964
Gastropoda - Euomphalina - Euomphalidae
Straparollus (Euomphalus) konobasis Jeffery et al. 1994
Jeffery et al. 1994
Straparollus (Euomphalus) variabilis Jeffery et al. 1994
Jeffery et al. 1994
Straparollus (Euomphalus) intermedius Gordon and Yochelson 1983
Jeffery et al. 1994
recombined as Amphiscapha intermedius
Gastropoda - Strobeidae
Globozyga mediocris Jeffery et al. 1994
Jeffery et al. 1994
Gastropoda - Bellerophontida - Euphemitidae
Euphemites whirligigi Jeffery et al. 1994
Jeffery et al. 1994
Gastropoda - Bellerophontida - Bellerophontidae
Bellerophon (Bellerophon) welshi Gordon and Yochelson 1987
Jeffery et al. 1994
Retispira yochelsoni Jeffery et al. 1994
Jeffery et al. 1994
Retispira cincta Gordon and Yochelson 1987
Jeffery et al. 1994
Gastropoda - Murchisoniina - Lophospiridae
Worthenia (Yochelsonospira) tenuilineata (Girty 1929)
Jeffery et al. 1994
recombined as Yochelsonospira tenuilineata
Gastropoda - Murchisoniina - Gosseletinidae
Glabrocingulum (Glabrocingulum) parasolum Jeffery et al. 1994
Jeffery et al. 1994
Glabrocingulum (Glabrocingulum) coronulum Jeffery et al. 1994
Jeffery et al. 1994
Bivalvia - Nuculanida - Polidevciidae
Phestia sp. Chernyshev 1951
Bivalvia - Nuculida - Nuculidae
Nuculopsis informal sp. A Girty 1912
Bivalvia - Pholadomyida - Edmondiidae
Edmondia sp. de Koninck 1841
Bivalvia - Grammysiidae
? Sphenotus sp. Hall 1884
Prothyris (Lophoprothyris) crista Hoare et al. 1989
Bivalvia - Carditida - Astartidae
Astartella cf. concentrica (Conrad 1842)
Bivalvia - Trigoniida - Schizodidae
Schizodus chesterensis Meek and Worthen 1860
Anthozoa - Stauriida - Hapsiphyllidae
Amplexizaphrentis maneri n. sp.
Webb and Sutherland 1993
Anthozoa - Stauriida - Antiphyllidae
? Bradyphyllum lesliense n. sp.
Webb and Sutherland 1993
see common names

Geography
Country:United States State/province:Arkansas County:Searcy
Coordinates: 35.8° North, 92.8° West (view map)
Paleocoordinates:12.3° South, 34.1° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Carboniferous Epoch:Mississippian
Stage:Serpukhovian 10 m.y. bin:Carboniferous 3
*Period:Early/Lower Carboniferous *Epoch:Early/Lower Serpukhovian
*Local age/stage:Late/Upper Chesterian
Key time interval:Serpukhovian
Age range of interval:330.90000 - 323.20000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Imo
Regional section:Elvirian Regional bed:10 m
Regional order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: 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)
Lithology and environment
Primary lithology:concretionary,black,gray lithified sandy grainstone
Secondary lithology: "shale"
Lithology description: ...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.
Environment:offshore Tectonic setting:cratonic basin
Geology comments: "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."
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USGS
Taxonomic list comments:Crinoids, bryozoans, brachiopods, bivalves, corals, nautiloids also present.
Metadata
Also known as:USGS Locs: 15302-PC, 15939-PC, 16260-PC, 28556-PC. ~18.5 km sw of Marshall
Database number:5518
Authorizer:J. Alroy, P. Wagner, M. Clapham Enterer:M. Sommers, P. Wagner, M. Clapham
Modifier:P. Wagner Research group:marine invertebrate
Created:1999-10-08 15:54:57 Last modified:2007-02-24 19:38:05
Access level:the public Released:1999-10-08 15:54:57
Creative Commons license:CC BY
Reference information

Primary reference:
19978. 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]

Secondary references:

11419 M. Gordon. 1964. Carboniferous Cephalopods of Arkansas. United States Geological Survey Professional Paper 460:1-322 [J. Alroy/C. Simpson/M. Clapham]
11422 D. L. Jeffery, R.D. Hoare, R.H. Mapes and C.J. Brown. 1994. Gastropods (Mollusca) from the Imo Formation (Mississippian, Chesterian) of north-central Arkansas. Journal of Paleontology 68(1):58-79 [P. Wagner/P. Wagner/P. Wagner]
327 G. E. Webb and P. K. Sutherland. 1993. Coral fauna of the Imo Formation, uppermost Chesterian, north-central Arkansas. Journal of Paleontology 67(2):179-193 [J. Alroy/M. Sommers/J. Alroy]