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

Where: Cuba (22.7° N, 83.8° W: paleocoordinates 5.8° N, 52.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: El Americano Member (Guasasa Formation), Late/Upper Tithonian to Late/Upper Tithonian (150.8 - 139.8 Ma)

• belongs to the upper part of the El Americano Formation; Upper Tithonian or Berriasian

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, blue lime mudstone and lithified, brown, gray, 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. During the Early Cretaceous the environment was one of deeper waters.
• ca. 4.5 m. Dark-grey-blue micritic limestone with thin intercalations of grey-brown marly shale.

Size class: microfossils

Collection methods: peel or thin section,

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 57205: authorized by Martin Aberhan, entered by Sabine Nürnberg on 09.12.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Protozoa
 Calpionellida -
  -