Section C in Hacienda El Americano, Sierra de los Organos, western Cuba - III (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, fine-grained, black, gray limestone and lithified 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.
• 8 m. Dark-grey to black, thick-bedded, partly dolomitized, fine-grained limestone with shale intercalations up to 15 cm thick.

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 57728: 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 - Neocomitidae
Lytohoplites sp., ? Lytohoplites sp.
 Ammonitida - Perisphinctidae
Aulacosphinctoides sp., "Virgatosphinctes" spp., "Virgatosphinctes" pinarensis, Pseudoinvoluticeras cf. mozambicum
"Virgatosphinctes" spp. Uhlig 1910 ammonite
"Virgatosphinctes" pinarensis Chudoley and Furrazola 1968 ammonite
Pseudoinvoluticeras cf. mozambicum Collignon 1960 ammonite
 Ammonitida - Haploceratidae
Haploceras aff. transatlanticum
Haploceras aff. transatlanticum Burckhardt 1906 ammonite