Figure 1. (A) Location map of the Piceance Basin, Colorado, with major gas-producing fields. (B) Stratigraphic cross section across the northern Piceance Basin.
HOUSTON, Apr. 17-- The US Geological Survey said western Colorado's Piceance basin has an estimated 1.525 trillion bbl of in-place oil shale. USGS added that no economic extraction method currently is ...
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