Tumbadero section, Sierra de los Organos, western Cuba - III (Jurassic of Cuba)

Where: Cuba (22.3° N, 84.1° W: paleocoordinates 5.0° N, 52.6° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• El Americano Member (?)

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, gray lime mudstone and lithified, brown, gray, argillaceous, 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.
• ca 3.5 m. Grey and dark-grey micritic, partly detritic, medium- and thin bedded limestone. It includes thin intercalations of grey-brown and grey clayey-marly shale. The shale intercalations contain the ammonites.

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 57192: authorized by Martin Aberhan, entered by Sabine Nürnberg on 09.12.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Oppeliidae
"Hildoglochiceras (Salinites) spp." = Salinites, "Hildoglochiceras (Salinites) cf. grossicostatum" = Salinites grossicostatum
"Hildoglochiceras (Salinites) spp." = Salinites Cantu-Chapa 1968 ammonite
"Hildoglochiceras (Salinites) cf. grossicostatum" = Salinites grossicostatum Imlay 1939 ammonite