Offshore zone +1, 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 (458.4 - 449.5 Ma)

• no information given

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

• gray to dark gray to bluish-gray limestone, fine- to coarse-grained, thinly to massivley bedded; argillaceous limestone, gray to brown.

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 32615: authorized by Steven Holland, entered by Tori Hanson on 10.07.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Streptelasm sp.
Florideophyceae
  -
"Tetradium fibratum" = Prismostylus fibratum
"Tetradium fibratum" = Prismostylus fibratum Safford 1856
Safford
Ostracoda
 Leperditicopida - Leperditiidae
Leperditia sp.
Leperditia sp. Rouault 1851 ostracod
Stenolaemata
 Trepostomata - Aisenvergiidae
Eridotrypa sp.
Eridotrypa sp. Ulrich 1893
 Trepostomata - Trematoporidae
Batostoma minnesotense, Batostoma implicatum
Batostoma implicatum Nicholson 1881
Nicholson
 Cryptostomata - Rhinidictyidae
Pachydictya foliata, Rhinidictya sp., Rhinidictya mutabilis
Rhinidictya sp. Ulrich 1882
Rhinidictya mutabilis Ulrich 1882
Ulrich
 Trepostomida - Monticuliporidae
Homotrypa sp., Homotrypa rubramosa, Homotrypa subramosa
Homotrypa sp. Ulrich 1882
Homotrypa subramosa Ulrich 1886
Ulrich
Rhynchonellata
 Atrypida - Anazygidae
Zygospira modesta
Zygospira modesta Hall 1847
Say
 Orthida - Draboviidae
Fascifera subcarinata
Fascifera subcarinata Ulrich and Cooper 1942
Ulrich & Cooper
 Orthida - Archaeorthidae
? Archaeorthis sp.
? Archaeorthis sp. Schuchert and Cooper 1931
 Orthida - Plectorthidae
Hebertella sp., "Hebertella borealis" = Mimella borealis
Hebertella sp. Hall and Clarke 1892
"Hebertella borealis" = Mimella borealis Billings 1859
(Billings)
 Rhynchonellida - Rhynchotrematidae
"Rhynchotrema argenturbiem" = Hypsiptycha argenturbicum, Rhynchotrema sp., Rhynchotrema increbescens
"Rhynchotrema argenturbiem" = Hypsiptycha argenturbicum White 1874
(White)
Rhynchotrema sp. Hall 1860
Rhynchotrema increbescens Hall 1847
(Hall)
Strophomenata
 Strophomenida - Rafinesquinidae
Rafinesquina trentonensis
Rafinesquina trentonensis Hall 1847
Conrad
Gastropoda
 Murchisoniina - Hormotomidae
Hormotoma gracilis
Hormotoma gracilis Hall 1847 snail
(Hall)
 Murchisoniina - Lophospiridae
Lophospira sp.
Lophospira sp. Whitfield 1886 snail
Cephalopoda
 Orthocerida - Orthoceratidae
Orthoceras sp.
Orthoceras sp. Breynius 1832
Stromatoporoidea
 Labechiida - Stromatoceriidae
Stromatocerium sp., Stromatocerium pustolosum, Stromatocerium rugosum
Stromatocerium sp. Hall 1847 stromatoporoid sponge
Stromatocerium pustolosum stromatoporoid sponge
Safford
Stromatocerium rugosum Hall 1847 stromatoporoid sponge
Hall