Isopachs of total net coal in beds >1.2' thick, A - G coal zones, Danforth Hills coal field (dan*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 through G coal zones, Danforth Hills
coal field. The coverage danathkg is the isopach coverage
for the A coal zone; danbthkg is for the B coal zone, and so
on.

本数据集包含形状文件（shapefile）与ARC/INFO多边形覆盖数据集（ARC/INFO polygon coverages），用于展示丹福斯丘陵煤田（Danforth Hills coal field）A至G号煤组中，厚度不小于1.2英尺的煤层的总净煤厚度等厚线。其中，数据集danathkg对应A号煤组的等厚线覆盖数据集；danbthkg对应B号煤组，以此类推。