STRI Loc. 290429 - Paraguachon [upper Jimol Fm] (Miocene of Colombia)

Also known as STRI Sample 17086

Where: La Guajira, Colombia (11.9° N, 71.4° W: paleocoordinates 11.2° N, 68.1° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: upper Jimol Member (Jimol Formation), Burdigalian (20.4 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Jimol Formation, which conformably overlies the Uipta Formation (early Miocene) and is conformably overlain by the Castilletes Formation. This area and nearby collections have been previously mapped as Castilletes Formaton (late Pliocene-early Pleistocene). AGE: Burdigalian, on the basis of macrofaunal composition; direct age established by extrapolation of Sr-isotope dating by enterer. STRATIGRAPHIC POSITION: From the upper section of Jimol Formation; slightly higher in stratigraphy than STRI Loc. 290428, and lower than STRI 290602; from 52 m below Jimol/Castilletes contact.

• bed-level stratigraphic resolution

Environment/lithology: lagoonal; poorly lithified, shelly/skeletal siltstone

• ENVIRONMENT: Siliciclastic, lagoonal, reduced salinity; 0-15 m.
• SPECIFIC LITHOLOGY: Poorly consolidated rusty silt matrix. LITHIFICATION: Poorly lithified, as determined in the field and based on museum-reposited specimens.

Size classes: macrofossils, mesofossils

Preservation: original aragonite

Collected by Hendy in 2011

Collection methods: surface (float), surface (in situ),

• COLLECTOR: A. Hendy, 03/14/2011. REPOSITORY: Presently reposited at FLMNH, Gainesville.

Primary reference: A. J. W. Hendy, D. S. Jones, F. Moreno, V. Zapata, and C. Jaramillo. 2015. Neogene molluscs, shallow marine paleoenvironments, and chronostratigraphy of the Guajira Peninsula, Colombia. Swiss Journal of Palaeontology 134(1):45-75 [A. Hendy/A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 158214: authorized by Austin Hendy, entered by Austin Hendy on 16.07.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Comprises characteristic molluscs. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature, and species-resolution identifications.
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Bivalvia
 Arcida - Arcidae
 Lucinida - Lucinidae
Phacoides sp. Blainville 1825 clam
Gastropoda
 Neogastropoda - Nassariidae
Gordanops baranoanus Anderson 1929 snail
 Cerithioidea - Potamididae
Terebralia dentilabris Gabb 1873 horn snail
Potamides suprasulcatus Gabb 1873 horn snail
 Cerithioidea - Turritellidae
Turritella matarucana Hodson 1926 turret shell
 Cerithioidea - Cerithiidae