1 entry 1 source
Colorado Group
Open directlyWebster's 1828 Dictionary · 1828
Part of speech: noun (n.)
A subdivision of the cretaceous formation of western North America, especially developed in Colorado and the upper Missouri region.
1 entry 1 source
Part of speech: noun (n.)
A subdivision of the cretaceous formation of western North America, especially developed in Colorado and the upper Missouri region.