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