ammonites
Section A in Hacienda El Americano, Sierra de los Organos, western Cuba - II (Jurassic of Cuba)

Where: Cuba (22.7° N, 83.6° W: paleocoordinates 5.1° N, 52.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: El Americano Member (Guasasa Formation), Early/Lower Tithonian (150.8 - 145.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, gray lime mudstone and lithified, brown, gray, argillaceous limestone

• 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.
• 1.5 m. Dark-grey, micritic, medium-bedded limestone, with intercalations of greyish-brown marly limestone and dark-grey marly shale. The limestone layers have wavy bounderies.

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 57712: authorized by Martin Aberhan, entered by Sabine Nürnberg on 20.12.2005