Lower Siltstone Member

Geology

Group: Difunta

Formation: Potrerillos

Lithologies: mudstone (2), siltstone (3), sandstone (2)

Paleoenvironments: delta plain (1), deltaic indet. (2), basinal (siliciclastic) (1)

Age range: Late/Upper Maastrichtian or 70.60000 to 66.00000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Early/Lower Maastrichtian70.6 - 66.0Mexico (Coahuila) (233862)
Late/Upper Maastrichtian70.6 - 66.0Mexico (Nuevo Leon) (228601 228602 235778)