Isopachs of total net coal in A-D coal zones, Yampa Coal Field (yam*thkg)
These are shapefiles and ARC/INFO polygon coverages showing
the isopachs of total net coal in beds greater than or equal
to 1.2' thick for the A, B, C, and D coal zones in the
Williams Fork Formation, Yampa coal field, northwestern
Colorado. YAMATHKG is for the A coal zone, YAMBTHKG is for
the B coal zone, etc.