Offshore zone -2, Kensington Quadrangle, Mill Creek (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; 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 32787: authorized by Steven Holland, entered by Tori Hanson on 15.07.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

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