DescriptionCretaceous-Tertiary boundary clay (Raton Formation, 65 Ma; southern Colorado, USA) (34782334145).jpg Cretaceous-Tertiary (K-T) boundary clay from...
Creative Commons Attribution 4.0 truetrue English A seismically induced onshore surge deposit at the KPg boundary, North Dakota determination method: SHA-1...
Raton Basin, Colorado, p. 52-55, illus Geol. Denver, Colorado. p Cretaceous 1943. Brown, R. W. Geol. Denver Basin, Colorado: p. 65-86. - Tertiary...
Prof. pi. 64, fig. 2; pi. 65, fig. 2; pi. 81, fig. 2, 1918. in This well-marked species, which is abundant the Raton formation in Colorado and New Mexico...
Fruitland Formation 19 Kirtland Shale 20 Tertiary Rocks 20 Ojo Alamo Sandstone 20 Animas Formation 20 Nacimiento Formation 21 San Jose Formation 21...
common The level to hilly Cretaceous Dissected Uplands are mostly underlain 35d by calcareous sands, clays, and gravels of Cretaceous age. Lithology is during...
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