Online Encyclopedia

WEST CENTRAL

Online Encyclopedia
Originally appearing in Volume V27, Page 631 of the 1911 Encyclopedia Britannica.
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WEST CENTRAL COLORADO Eocene or later. West Elk breccia Unconformity. Cretaceous. Ruby formation Unconformity. Ohio formation (local only) 200 ft. Unconformity. Laramie formation 2000 ft. Montana formation 280o „ Niobrara formation too- 200 Benton formation 150- 300 „ Dakota formation 40- 300 Jurassic. Gunnison formation 350- 500 ft. Unconformity. Pennsylvanian. Maroon conglomerate 4500 ft. Possible unconformity. Weber limestone too- 550 ft. Unconformity. Mississippian. Leadville limestone .. 400- 525 ft. Apparent unconformity. Ordovician. Yule limestone 350- 450 ft. Upper Cambrian. Sawatch quartzite 50- 350 ft. Unconformity. Archean.
End of Article: WEST CENTRAL
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