STRI Loc. 290420B - Aulechit-Castilletes Rd [middle Jimol Fm] (Miocene of Colombia)

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• coordinate based on unpublished field data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; 1-2 m higher in section than 290420A; 143 m below Jimol-Castilletes Fm contact.

• bed-level stratigraphic resolution

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

• ENVIRONMENT: Shallow sub tidal siliciclastic setting, normal salinity; 5-30 m.
• SPECIFIC LITHOLOGY: Poorly consolidated rusty sand 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 156796: 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.
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Gastropoda
 Heterostropha - Architectonicidae
Architectonica nobilis Röding 1798 sundial
 Cerithioidea - Turritellidae
Turritella machapoorensis Maury 1925 turret shell
Turritella cocoditana Hodson 1926 turret shell
 Neogastropoda - Muricidae
Cymia cocoditana Hodson 1931 murex snail
 Neogastropoda - Buccinidae
Solenosteira sp. Dall 1890 true whelk
 Neogastropoda - Turbinellidae
Turbinella falconensis Hodson 1931 snail
Bivalvia
 Ostreida - Ostreidae
Crassostrea sp. Sacco 1897 oyster
 Pectinida - Pectinoidae
Lindapecten buchivacoanus Hodson et al. 1927 scallop
 Arcida - Arcidae
 Cardiida - Veneridae
"Chionopsis paraguanensis" = Chione (Chionopsis) tegulum, Lamelliconcha sp.
"Chionopsis paraguanensis" = Chione (Chionopsis) tegulum Brown and Pilsbry 1911 venus clam
Lamelliconcha sp. Dall 1902 venus clam
 Cardiida - Cardiidae
 Cardiida - Tellinidae
"Psammacoma falconensis" = Psammacoma gatunensis Toula 1909 tellin clam
Eurytellina paraguanensis Hodson 1931 tellin clam
 Carditida - Crassatellidae
Crassinella sp. Guppy 1874 clam
 Carditida - Carditidae
Glyptoactis paraguanensis Hodson 1931 clam
Echinoidea
 Cidaroida -
Cidaroida indet. Claus 1880 pencil urchin