Antigua Formation: Late/Upper Oligocene, Antigua and Barbuda
collected by Spencer 1915

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Echinoidea - Clypeasteroida - Clypeasteridae
Diplothecanthus concavus
Diplothecanthus antillarum
Echinoidea - Clypeasteroida - Laganidae
Sismondia antillarum
Echinoidea - Echinolampadoida - Echinolampadidae
Echinolampas anguillae Cotteau 1875
Echinoidea - Spatangoida - Brissidae
Metalia sp. Gray 1855
Echinoidea - Spatangoida - Schizasteridae
Schizaster clevei
Gastropoda - Turritellidae
Turritella forresti Brown 1913
Gastropoda - Epitoniidae
Scala (Sthenorhytis) antiguensis Brown 1913
recombined as Sthenorhytis antiguense
Bivalvia - Ostreida - Gryphaeidae
Ostrea antiguensis Brown 1913
recombined as Pycnodonte (Crenostrea) antiguensis
Bivalvia - Pectinida - Pectinidae
Pecten (Plagioctenium) gabbi Dall 1898
synonym of Interchlamys interlineata
Pecten (Aequipecten) thetidis (Sowerby 1850)
recombined as Argopecten thetidis
Pecten (Aequipecten) oxygonum (Sowerby 1850)
synonym of Argopecten thetidis
Pecten nugenti Brown 1913
Pecten (Chlamys) anguillensis (Guppy 1867)
recombined as Antillipecten anguillensis
Pecten (Amusium) antiguensis Brown 1913
recombined as Flabellipecten antiguensis
Bivalvia - Pectinida - Spondylidae
Spondylus sp. Linnaeus 1758
see common names

Geography
Country:Antigua and Barbuda
Coordinates: 17.2° North, 61.9° West (view map)
Paleocoordinates:16.4° North, 60.9° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Oligocene
Stage:Chattian 10 m.y. bin:Cenozoic 4
Key time interval:Late/Upper Oligocene
Age range of interval:27.82000 - 23.03000 m.y. ago
Stratigraphy
Formation:Antigua
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Antigua Fm. Lithostratigraphic relationships not discussed in publication. AGE: Late Oligocene according to text based on macro- and microfaunal biostratigraphy, and supported by more recent publications. THICKNESS: Formation attains a thickness of 1500 ft. STRATIGRAPHIC POSITION: From unknown position within formation.
Lithology and environment
Primary lithology:shelly/skeletal lithified marl
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: White chalky or marly rock with hard layers (limestone). LITHIFICATION: Lithified, on the basis of facies description and figured specimens.
Environment:reef, buildup or bioherm
Geology comments: ENVIRONMENT: Carbonate environments, rich in coral and epifaunal molluscan taxa.
Taphonomy
Modes of preservation:body,original calcite,replaced with calcite
Size of fossils:macrofossils
Preservation of anatomical detail:poor
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Collectors:Spencer Collection dates:1915
Collection method comments: COLLECTOR: Spencer, c. 1900-1901. REPOSITORY: Not stated, but is likely to be USNM, Washington as they were identified by W. H. Dall.
Taxonomic list comments:COVERAGE: Probably not exhaustive for gastropoda and bivalvia, but comprehensive for anthozoa. NOMENCLATURE: An authoritative publication but with with very antiquated nomenclature. Nevertheless, all taxa are identified to species and subgenus resolution.
Metadata
Database number:80290
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2008-04-10 21:19:17 Last modified:2013-11-25 13:37:23
Access level:the public Released:2008-04-10 21:19:17
Creative Commons license:CC BY
Reference information

Primary reference:
26998. A. P. Brown. 1913. Notes on the Geology of the Island of Antigua. Proceedings of the Academy of Natural Sciences, Philadelphia 584-616 [A. Hendy/A. Hendy]