Uranium in the Tertiary intermontane basins of Colorado
The uranium occurrences in the Colorado basins are spatially related to volcanic fields, principally of Oligocene age, where lithologically favorable fluvial host sediments are (1) subjacent to the volcanic piles in the upland basins or (2) subjacent to volcaniclastic outwash and tuffaceous lake beds in deeper basins near the volcanic piles. The Tertiary intermontane basins in Colorado contain numerous, shallow prospects and several small deposits of uranium in geologic environments similar to those in the prolific uranium districts of central Wyoming. The occurrences in Colorado are in the deep ...
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