STRI Loc. 290818 (Quadrat A) - Road to Siapana [upper Jimol Fm] (Miocene of Colombia)

Where: La Guajira, Colombia (12.0° N, 71.3° W: paleocoordinates 11.2° N, 68.0° 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• coordinate based on unpublished field data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 unconformably 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 96 m below the Jimol/Castilletes contact.

• bed-level stratigraphic resolution

Environment/lithology: lagoonal; unlithified, shelly/skeletal siltstone

• ENVIRONMENT: Shallow marine (0-5 m), siliciclastic, probably reduced salinity.
• SPECIFIC LITHOLOGY: Unconsolidated silty matrix. LITHIFICATION: Unlithified, as determined in the field and based on museum-reposited specimens.

Size class: macrofossils

Preservation: original calcite

Collected by Hendy in 2014

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

• COLLECTOR: A. Hendy, 01/21/2014. REPOSITORY: Presently reposited at Universidad del Norte, Colombia. ABUNDANCE: Estimate based on relative abundance within a 25cm2 quadrat; A=abundant (10 or more specimens per quadrat; C=common (3-9 specimens per quadrat; R=rare (1-2 specimens per quadrate).

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 160798: authorized by Austin Hendy, entered by Austin Hendy on 28.08.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for mollusca. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature, and species-resolution identifications.
Gastropoda
 Cerithioidea - Turritellidae
Turritella cocoditana Hodson 1926 turret shell
Bivalvia
 Pectinida - Pectinoidae
Lindapecten buchivacoanus Hodson et al. 1927 scallop
 Ostreida - Ostreidae
Crassostrea sp. Sacco 1897 oyster
 Arcida - Arcidae
 Arcida - Glycymerididae
Tucetona democraciana Hodson et al. 1927 clam
 Cardiida - Veneridae
Macrocallista cf. maculata Linnaeus 1758 venus clam
Gouldia sp. Adams 1847 venus clam
 Carditida - Crassatellidae