Boundaries delimiting areas within which resources were calculated for A through D coal zones, Yampa coal field, CO (yam*bndg)

These are shapefiles and coverages that outline the areas underlain by the A, B, C, and D coal zones in the Yampa coal field. They delimit the area within which resources were calculated and reported for each zone.本数据集包含用于勾勒扬帕煤田（Yampa coal field）内A、B、C、D四个煤组下方赋存区域的形状文件（shapefiles）与覆盖数据集（coverages）。此类数据划定了针对各煤组开展矿产资源量计算与上报的范围边界。