Guasasa Formation

Geology

Members: El Americano (34), Tumbadero (4)

Lithologies: mudstone (3), "shale" (15), lime mudstone (21), grainstone (2), "limestone" (21), dolomite (2), chert (1)

Paleoenvironments: marine indet. (2), open shallow subtidal (31), offshore shelf (5)

Age range: base of the Early/Lower Tithonian to the top of the Early/Lower Valanginian or 149.20000 to 132.60000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Early/Lower Tithonian149.2 - 145.06Cuba (57203 57711 57712 57718)
Tithonian149.2 - 143.1Cuba (57190 57191 57192 57194 57195 57196 57197 57198 57199 57200 57201 57714 57715 57717 57719 57720 57721 57722 57723 57724 57726 57727 57728 57729 57730)
Late/Upper Tithonian145.06 - 143.1Cuba (57204 57708 57713)
Late/Upper Tithonian - Berriasian145.06 - 137.05Cuba (57205)
Berriasian143.1 - 137.05Cuba (57202 57709)
Berriasian - Early/Lower Valanginian143.1 - 132.6Cuba (57725)
Late/Upper Berriasian - Early/Lower Valanginian139.1 - 132.6Cuba (57716)
Early/Lower Valanginian137.05 - 132.6Cuba (57710)