STRI Loc. 290426 - Paraguachon [upper Jimol Fm] (Miocene of Colombia)

Also known as STRI Sample 17076

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• coordinate based on unpublished field data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; from 62 m below Jimol/Castilletes contact.

• bed-level stratigraphic resolution

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

• ENVIRONMENT: Shallow sub tidal siliciclastic setting, normal salinity; 5-30 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 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 156832: authorized by Austin Hendy, entered by Austin Hendy on 01.06.2014

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.
Gastropoda
 Neotaenioglossa - Calyptraeidae
Crucibulum (Dispotaea) sp. Say 1824 slipper shell
 Cerithioidea - Turritellidae
Turritella matarucana Hodson 1926 turret shell
Turritella cocoditana Hodson 1926 turret shell
 Cerithioidea - Potamididae
Potamides suprasulcatus Gabb 1873 horn snail
 Neogastropoda - Buccinidae
 Neogastropoda - Conidae
Conus talis Jung 1965 cone shell
Conus cf. chipolanus Dall 1896 cone shell
 Neogastropoda - Terebridae
Strioterebrum cf. ulloa Olsson 1932 auger snail
 Neogastropoda - Turbinellidae
Turbinella falconensis Hodson 1931 snail
 Neogastropoda - Costellariidae
Conomitra sp. Conrad 1865 ribbed mitre
 Neogastropoda - Marginellidae
Prunum quirosense Hodson 1927 margin shell
 Neogastropoda - Muricidae
Cymia cocoditana Hodson 1931 murex snail
 Neogastropoda - Cancellariidae
Euclia werenfelsi Jung 1965 snail
Bivetiella gabbiana Pilsbry and Johnson 1917 snail
 Sorbeoconcha - Cypraeidae
Muracypraea aff. hyaena Schilder 1939 cowry
 Sorbeoconcha - Naticidae
Stigmaulax sp. Morch 1852 moon snail
 Heterostropha - Architectonicidae
Architectonica nobilis Röding 1798 sundial
Bivalvia
 Arcida - Arcidae
 Pectinida - Pectinoidae
Leopecten sp. Masuda 1971 scallop
 Cardiida - Veneridae
Macrocallista cf. maculata Linnaeus 1758 venus clam
 Cardiida - Cardiidae
 Solenida - Solenidae
Solena sp. Mörch 1853 clam
 Carditida - Crassatellidae
Polychaeta
  -
Polychaeta indet. Grube 1850