56.75 mile post, Pitch Lake, Brighton (Oligocene of Trinidad and Tobago)

Where: Trinidad and Tobago (10.2° N, 61.6° W: paleocoordinates 9.2° N, 56.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Late/Upper Oligocene (28.4 - 23.0 Ma)

• STRATIGRAPHIC RELATIONS: From unnamed lithostratigraphic unit. Apparently underlies supposed Oligocene beds at Brighton, and is in turn regionally overlain by true Miocene through Pleistocene strata. AGE: Late Oligocene, as stated, although it is said to contain fossils that occur in strata no older than the "Chipolan" (=Chipola Fm of Florida, Early Miocene) in age. Nevertheless some faunal composition could permit a Late Oligocene age to which it is here assigned. STRATIGRAPHIC POSITION: From unknown position within regional section.

• bed-level stratigraphic resolution

Environment/lithology: coastal; lithified, brown, yellow ironstone

• ENVIRONMENT: Shallow marine siliciclastic setting.
• SPECIFIC LITHOLOGY: Yellowish-brown ferruginous bed. LITHIFICATION: Lithified, based on facies description and figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collected by Veatch & Maury; reposited in the PRI

• COLLECTORS: A. Veatch and C. Maury, c. 1912. REPOSITORY: PRI, Ithaca (NY).

Primary reference: C. J. Maury. 1912. A contribution to the paleontology of Trinidad. Journal of the Academy of Natural Sciences of Philadelphia 15:1-112 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 80169: authorized by Austin Hendy, entered by Austin Hendy on 07.04.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: An authoritative publication, but rather antiquated, though with identifications made to species resolution.
Bivalvia
 Arcida - Arcidae
Arca sp., "Arca (Cunearca) chemnitzioides" = Anadara (Cunearca) chemnitzioides
Arca sp. Linnaeus 1758 ark
"Arca (Cunearca) chemnitzioides" = Anadara (Cunearca) chemnitzioides Maury 1912 ark
 Carditida - Carditidae
"Cardita (Carditamera) virginiae" = Carditamera virginiae
"Cardita (Carditamera) virginiae" = Carditamera virginiae Maury 1912 clam
 Pholadida - Corbulidae
Corbula sp. Bruguière 1789 clam
 Pholadida - Pholadidae
Gastropoda
 Neogastropoda - Olividae
Oliva trinidadensis Maury 1912 olive snail
 Neogastropoda - Muricidae
Purpura sp., "Murex cf. domingensis" = Chicoreus (Siratus) domingensis
Purpura sp. Bruguière 1789 murex snail
"Murex cf. domingensis" = Chicoreus (Siratus) domingensis Sowerby 1850 murex snail
 Neogastropoda - Terebridae
Terebra sp. Bruguière 1789 auger snail
 Calyptraeoidea - Calyptraeidae
Calyptraea centralis Conrad 1841 slipper shell