STRI Loc. 290417 - Aulechit-Castilletes Rd [middle Jimol Fm] (Miocene of Colombia)

Also known as STRI Sample 16820

Where: La Guajira, Colombia (11.9° N, 71.4° W: paleocoordinates 11.1° N, 68.1° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: middle 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: Probably from the middle section of Jimol Formation, but uncertain as from a faulted area; from 110 m below the Jimol/Castilletes contact.

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; poorly lithified, medium-grained, shelly/skeletal sandstone

• ENVIRONMENT: Shallow sub tidal siliciclastic setting, normal salinity; 5-30 m.
• SPECIFIC LITHOLOGY: Poorly consolidated rusty medium matrix. LITHIFICATION: Poorly lithified, as determined in the field and based on museum-reposited specimens.

Size classes: macrofossils, mesofossils

Preservation: original calcite, replaced with calcite

Collected by Hendy in 2011

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

• COLLECTOR: A. Hendy, 03/07/2011. 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 156792: authorized by Austin Hendy, entered by Austin Hendy on 31.05.2014

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.
Anthozoa
 Hexacorallia -
Scleractinia indet. Bourne 1900 stony coral
Bivalvia
 Arcida - Arcidae
 Carditida - Crassatellidae
Eucrassatella venezuelana Hodson 1927 clam
 Cardiida - Cardiidae
 Cardiida - Veneridae
Gouldia sp. Adams 1847 venus clam
Gastropoda
 Cerithioidea - Potamididae
Potamides suprasulcatus Gabb 1873 horn snail
 Cerithioidea - Turritellidae
Turritella cocoditana Hodson 1926 turret shell
 Sorbeoconcha - Naticidae