Rexroad Formation
Geology
Members: unnamed (5), upper (8), XI (1)
Lithologies: not reported (1), siltstone (1), sandstone (1)
Paleoenvironments: terrestrial indet. (13), fluvial indet. (1)
Age range: base of the Late/Upper Hemphillian to the top of the Late/Upper Pliocene or 10.30000 to 2.58800 Ma