Results: 1 - 3 of 3
Mar 31, 2006
Geo-Note
… mineral exploration holes, 230 coal holes, a minimum of 5432 water … holes contain information about coal in the Clear Hills region; b) 96 of the 146 exploratory coal holes drilled in the Clear …
Oct 16, 2005
Map
… exclusive of the fossil fuels (coal, oil and gas), sand and …
Dec 31, 1974
Information Series
… energy sources (subbituminous coal or natural gas), then …