ammonites
Sierra de Cabezas section, Sierra de los Organos, western Cuba - II (Jurassic of Cuba)

Where: Cuba (22.6° N, 83.9° W: paleocoordinates 5.2° N, 52.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• El Americano Member (?)

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, gray, blue lime mudstone and lithified mudstone

• 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. 1.2 m. Dark-grey and dark-blue, well stratified micritic limestone in beds up to 25 cm thick, intercalated with mudstone.

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 57198: authorized by Martin Aberhan, entered by Sabine Nürnberg on 09.12.2005