Section B in Hacienda El Americano, Sierra de los Organos, western Cuba - I (Jurassic of Cuba)

Where: Cuba (22.7° N, 83.6° W: paleocoordinates 5.0° N, 52.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: El Americano Member (Guasasa Formation), Tithonian (152.1 - 145.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, gray lime mudstone and lithified, calcareous 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. In the Late Tithonian the basin was apparently shallower and the energy of the environment increased.
• 2.5-3 m. Dark-grey micritic limestone, medium- and thick-bedded, with intercalations of marly shale.

Size class: macrofossils

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 57717: authorized by Martin Aberhan, entered by Sabine Nürnberg on 20.12.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Perisphinctidae
Nebrodites (Mesosimoceras) sp.
 Ammonitida - Ataxioceratidae
? Lithacoceras sp.
? Lithacoceras sp. Hyatt 1900 ammonite
 Ammonitida - Oppeliidae
Neochetoceras sp., Mazapilites sp.
Mazapilites sp. ammonite
 Ammonitida - Protancyloceratidae
Protancyloceras aff. gracile
Protancyloceras aff. gracile Oppel 1865 ammonoid