The Guasasa Formation is a
geologic formation
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ...
in
Cuba
Cuba ( , ), officially the Republic of Cuba ( es, República de Cuba, links=no ), is an island country comprising the island of Cuba, as well as Isla de la Juventud and several minor archipelagos. Cuba is located where the northern Caribbea ...
. It is
Tithonian to Early
Valanginian
In the geologic timescale, the Valanginian is an age or stage of the Early or Lower Cretaceous. It spans between 139.8 ± 3.0 Ma and 132.9 ± 2.0 Ma (million years ago). The Valanginian Stage succeeds the Berriasian Stage of the Lower Cretace ...
in age and contains fossils of
ammonites.
Description
It primarily consists of limestone.
See also
*
List of fossiliferous stratigraphic units in Cuba
References
Further reading
* {{cite LSA , last=Bermúdez , first=Pedro J , year=1961 , title=Las formaciones geológicas de Cuba , url=http://paleoarchive.com/literature/Bermudez1961-FormacionesGeologicasCuba.pdf , journal=
Geología Cubana , volume=1 , pages=1–180 , accessdate=2019-02-06
* R. Myczynski. 1989. Ammonite biostratigraphy of the Tithonian of Western Cuba. Annales Societatis Geologorum Poloniae 59:43-125
Geologic formations of Cuba
Jurassic Cuba
Cretaceous Cuba
Shale formations
Limestone formations
Dolomite formations
Shallow marine deposits
Open marine deposits
Formations