Tn 1976, the U.S. Bureau of Reclamation cored 8 holes in the White Tail Butte quadrangle in conjunction with the U.S. Bureau of Land Management's Energy Minerals Resource Inventory and Analysis (EMRIA) studies. The coring was designed to evaluate the Anderson and Canyon coal beds and their overburden and interburden). As this study area fell within the EMRIA Recluse Geologic Model Area, the U.S. Geological Survey arranged to continue the coring in two of the holes, 76-103 and 76-108, in order to obtain samples of the coal and rocks in the remainder of the coal—bearing section below the Canyon.