Offshore zone -1, Durham Quadrangle, Cooper Heights (Chattanooga Valley) (Ordovician of the United States)

Where: Walker County, Georgia (34.8° N, 85.4° W: paleocoordinates 29.2° S, 66.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Caradoc (458.4 - 449.5 Ma)

• no information given

Environment/lithology: offshore; blue, argillaceous limestone

• \"The lower 6 feet are composed of massively-beded, blue, medium-grained crystalline limestone. Upwards the rocks become more argillaceous and the grain size of the limestone is reduced. Most of the limestone in the middle portion is thinly bedded with abundant thin argillaceous bands. Intraformational conglomerates always occur at the base of each crystalline layer. The rocks in the upper 10 or 12 feet are of massivley bedded, dark-gray and brownish-gray calcilutite."

Size class: macrofossils

Primary reference: A. T. Allen and J. G. Lester. 1957. Zonation of the Middle and Upper Ordovician strata in northwestern Georgia. Georgia State Division of Conservation, the Geological Survey Bulletin 66:1-104 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 32656: authorized by Steven Holland, entered by Tori Hanson on 11.07.2003, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Sibulites aff. subelongatus
Cephalopoda
 Orthocerida - Orthoceratidae
Orthoceras sp.
Orthoceras sp. Breynius 1832
Gastropoda
 Murchisoniina - Lophospiridae
Paupospira burginensis
Paupospira burginensis Ulrich and Scofield 1897 snail
(Ulrich & Scofield)
Rhynchonellata
 Orthida - Plectorthidae
Hebertella sp.
Hebertella sp. Hall and Clarke 1892
 Atrypida - Anazygidae
"Zygospira recurvirostris" = Anazyga recurvirostra, Zygospira modesta
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
Hall
Zygospira modesta Hall 1847
Say
Strophomenata
 Strophomenida - Rafinesquinidae
Rafinesquina sp.
Rafinesquina sp. Hall and Clarke 1892
Stenolaemata
 Trepostomida - Monticuliporidae
Homotrypa sp.
Homotrypa sp. Ulrich 1882
Anthozoa
 Stauriida - Lambelasmatidae
"Streptelasma profundum" = Lambeophyllum profundum
"Streptelasma profundum" = Lambeophyllum profundum Conrad 1843 horn coral
(Conrad)
Florideophyceae
  -
"Tetradium aff. fibratum" = Prismostylus fibratum
"Tetradium aff. fibratum" = Prismostylus fibratum Safford 1856
(Safford)