Offshore zone -2, Durham Quadrangle, north of Cooper Heights (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 (460.9 - 449.5 Ma)

• no information given

Environment/lithology: offshore; gray, argillaceous limestone and gray shale

• flaggy, gray to blue-gray, crystalline argillaceous limestone. thin beds of gray shale.

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 32791: authorized by Steven Holland, entered by Tori Hanson on 15.07.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

 Asaphida - Asaphidae
Isotelus sp. Dekay 1824 trilobite
 Leperditicopida - Leperditiidae
Leperditia sp. Rouault 1851 ostracod
 Orthotetida - Triplesiidae
Oxoplecia holstonensis Willard 1928
 Strophomenida - Sowerbyellidae
Sowerbyella sp. Jones 1928
 Strophomenida - Rafinesquinidae
Rafinesquina sp. Hall and Clarke 1892
 Strophomenida - Strophomenidae
Strophomena planumbona Hall 1847
Strophomena incurvata Shephard 1838
 Atrypida - Anazygidae
"Zygospira recurvirostris" = Anazyga recurvirostra, Zygospira sp., Zygospira modesta
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
Zygospira sp. Hall 1862
Zygospira modesta Hall 1847
 Rhynchonellida - Ancistrorhynchidae
Ancistrorhyncha costata Ulrich and Cooper 1942
Ulrich & Cooper
 Orthida - Draboviidae
Pionodema sp. Foerste 1912
Pionodema subaequata Conrad 1843
 Orthida - Hesperorthidae
Hesperorthis tricenaria Conrad 1843
 Trochonematoidea - Lophospiridae
Lophospira sp. Whitfield 1886 snail
 Murchisoniina - Eotomariidae
Liospira sp. Ulrich and Scofield 1897 snail
 Orthocerida - Orthoceratidae
Orthoceras sp. Breynius 1832
 Cryptostomata - Ptilodictyonidae
Escharopora sp. Hall 1847
 Cryptostomata - Rhinidictyidae
 Cryptostomata - Arthrostylidae
Helopora sp. Hall 1851
 Trepostomata - Heterotrypidae
Dekayella sp. Ulrich 1882
 Trepostomata - Monticuliporidae
Homotrypa sp. Ulrich 1882
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral
 Stauriida - Stauriidae
Favistella sp. Dana 1846 horn coral
Favistella halli horn coral
 Stauriida - Columnariidae
Columnaria (Favistella) halli horn coral