Valle del Ancón section, Sierra de los Organos, western Cuba - I (Jurassic of Cuba)

Where: Cuba (22.7° N, 83.8° W: paleocoordinates 5.3° N, 52.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: El Americano Member (Guasasa Formation), Early/Lower Tithonian (150.8 - 145.0 Ma)

• belongs to the upper part of the El Americano Formation; Chitinoidella Zone, upper part of the Lower Tithonian

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, black lime mudstone and lithified shale

• The Lower Tithonian strata of the Sierra de los Organos were laid down in a shallow, poorly ventilated sea. At the end of the Early Tithonian, the conditions of sedimentation changed slightly, mainly due to moderate deepening of the basin.
• 3.5 m. Black, micritic limestone in beds 15-20 cm thick, with thin intercalations of dark shale. The limestone is slightly dolomitic and bituminous.

Size classes: macrofossils, microfossils

Primary reference: R. Myczynski. 1989. Ammonite biostratigraphy of the Tithonian of Western Cuba. Annales Societatis Geologorum Poloniae 59:43-125 [M. Aberhan/S. Nurnberg]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 57203: authorized by Martin Aberhan, entered by Sabine Nürnberg on 09.12.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Protozoa
 Calpionellida -
Chitinoidella boneti
Crinoidea
 Roveacrinida - Saccocomidae
Saccocoma sp.
Saccocoma sp. Agassiz 1836 Sea lily
Cephalopoda
 Ammonitida - Simoceratidae
? Virgatosimoceras sp.
 Ammonitida - Haploceratidae
Pseudolissoceras sp.
Pseudolissoceras sp. Spath 1925 ammonite