Allen Formation
Geology
Group: Malargüe
Members: unnamed (31), Lower (16), Middle (37), Upper (1)
Lithologies: not reported (11), claystone (1), mudstone (39), "shale" (1), siltstone (8), sandstone (64), conglomerate (1), lime mudstone (1), "limestone" (3), gypsum (4)
Paleoenvironments: marine indet. (3), terrestrial indet. (40), shallow subtidal indet. (1), marginal marine indet. (6), estuary/bay (1), lagoonal (1), fluvial indet. (19), fluvial-lacustrine indet. (1), lacustrine deltaic indet. (7), lacustrine indet. (3), interdune (3)
Age range: base of the Early/Lower Ordovician to the top of the Early/Lower Pleistocene or 485.40000 to 0.78100 Ma
Collections