Bridgeboro Quarry: Early/Lower Oligocene, Georgia

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Melobesiidae indet.
? Sabellaridae indet.
"sabellarid(?) tubes"
Anthozoa
Anthozoa indet. Ehrenberg 1834
"unidentified colonial coral"
Anthozoa - Scleractinia - Caryophylliidae
? Trochocyathus sp. Milne-Edwards and Haime 1848
Echinoidea - Cidaroida - Cidaridae
? Prionocidaris sp. Agassiz 1863
Echinoidea - Clypeasteroida - Clypeasteridae
Clypeaster cotteaui Egozcue 1897
Echinoidea - Cassiduloida - Cassidulidae
Rhyncholampas gouldii Bouvé 1846
Echinoidea - Spatangoida - Brissidae
Brissus sp. Gray 1825
Gymnolaemata - Cheilostomata
Cheilostomata indet. Busk 1859
"encrusting cheilostomes"
Bivalvia
Bivalvia indet. Linnaeus 1758
"3 unidentified species"
Bivalvia - Mytilida - Mytilidae
Lithophaga nuda Dall 1898
Bivalvia - Arcida - Glycymerididae
Glycymeris cf. cookei Dall 1916
Bivalvia - Ostreida - Ostreidae
Ostrea informal sp. A Linnaeus 1758
Ostrea informal sp. B Linnaeus 1758
Bivalvia - Pectinida - Pectinidae
Chlamys duncanensis (Mansfield 1934)
Chlamys sp. Röding 1798
Bivalvia - Pectinida - Limidae
Lima sp. Bruguière 1797
Bivalvia - Lucinida - Lucinidae
Phacoides sp. Blainville 1825
Bivalvia - Cardiida - Veneridae
? Pitar sp. Römer 1857
Gastropoda
Gastropoda indet. Cuvier 1795
"2 or 3 unidentified species"
Gastropoda - Cerithiidae
Cerithium cf. hernandoensis
Gastropoda - Turritellidae
Turritella sp. Lamarck 1799
Gastropoda - Neogastropoda - Conidae
Conus sp. Linnaeus 1758
Gastropoda - Ampullinidae
Ampullina cf. flintensis
Foraminiferida
Foraminiferida indet. (Eichwald 1830)
spelled with current rank as Foraminifera
"4 species of smaller foraminifera"
Lepidocyclinidae
Lepidocyclina sp.
Florideophyceae - Corallinales - Lithophyllaceae
Lithophyllum sp. Philippi 1837
Florideophyceae - Corallinales
Archaeolithothamnium sp. Rothpletz 1891
Florideophyceae - Corallinales - Hydrolithaceae
Lithoporella sp. Foslie 1909
see common names

Geography
Country:United States State/province:Georgia County:Worth
Coordinates: 31.4° North, 84.0° West (view map)
Paleocoordinates:31.5° North, 77.5° West
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period:Paleogene Epoch:Oligocene
Stage:Rupelian 10 m.y. bin:Cenozoic 4
Key time interval:Early/Lower Oligocene
Age range of interval:33.90000 - 27.82000 m.y. ago
Stratigraphy
Formation:Bridgeboro Limestone
Stratigraphic resolution:group of beds
Stratigraphy comments: type locality of formation
"Three (~1-3 m thick) zones of matrix-rich, algal-poor beds... occur within the quarry section. One of these zones corresponds to the upper 2 meters of the section and was sampled for paleoecologic analyses"
fauna indicates a "Lower Oligocene" or "Vicksburgian" age
Lithology and environment
Primary lithology:concretionary poorly lithified calcareous,cherty/siliceous sandstone
Secondary lithology:concretionary lithified "limestone"
Includes fossils?Y
Lithology description: limestone is "dominated by a densely packed mass of algal rhodoliths... Compared to the rhodoliths the enclosing matrix is relatively soft, therefore facilitating collection... rhodoliths and enclosing carbonate sand have in part been replaced by chert... Lenses and pockets of a yellowish-green clay intercalated with the algal limestone occurs mostly in the upper 15 meters of the section"
Environment:open shallow subtidal
Geology comments: a "high-energy" environment of "moderate to shallow water depth" on a carbonate shelf above wave base; "paucity of fine-grained sediments supports a low turbidity environment" with "a warm, normal marine, open-ocean setting" and an "irregular and mobile substrate produced by the rhodoliths"
Taphonomy
Modes of preservation:body,mold/impression
Size of fossils:macrofossils
Spatial resolution:parautochthonous
Collection methods and comments
Collection methods:field collection
Reason for describing collection:paleoecologic analysis
Collection method comments: repository unclear
Metadata
Database number:90567
Authorizer:J. Alroy, M. Clapham Enterer:J. Alroy, K. Hassell
Research group:marine invertebrate
Created:2009-08-06 10:20:49 Last modified:2009-08-06 13:20:49
Access level:the public Released:2009-08-06 10:20:49
Creative Commons license:CC BY
Reference information

Primary reference:
30468. J. P. Manker and B. D. Carter. 1987. Paleoecology and paleogeography of an extensive rhodolith facies from the Lower Oligocene of south Georgia and north Florida. Palaios 2(2):181-188 [J. Alroy/J. Alroy]