Usa

Formation(s)

Hell Creek and Fort Union

Raton

Raton

Raton

Raton

Basin

Williston

Raton

Raton

Raton

Raton

Principal reference

Tschudy (1970)

Orth et al. (1981)

Orth et al. (1982)

Pillmore et al. (1984)

Pillmore and Fleming (1990)

Sub decimeter

No

Yes

Yes

Yes

Yes

palynology resolution

0 0

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