Tullock Member, Formation

Geology

Formation: Fort Union

Members: unnamed (23), Collins Ranch (1), lower (1)

Lithologies: not reported (23), "siliciclastic" (13), siltstone (3), sandstone (32), conglomerate (1), coal (9), lignite (1)

Paleoenvironments: terrestrial indet. (43), deltaic indet. (1), fluvial indet. (20), coarse channel fill (3), fine channel fill (2), "channel" (5), fluvial-lacustrine indet. (1)

Age range: Pu1 or 66.00000 to 63.30000 Ma