A coverage that differentiates between areas where the total Calico and A-sequence coal-bearing interval is preserved and where the coal-bearing strata are partially eroded in the Kaiparowits Plateau, southern Utah

This is a polygon coverage that represents areas underlain
by the coal-bearing Calico and A-sequences of the Straight
Cliffs Formation east of 112 degrees of longitude. It
differentiates between areas that contain the entire
coal-bearing interval and areas where the coal-bearing
strata are partially eroded. The outermost polygon defines
the base of the Calico and A-sequences. The inner polygon
shows where the complete coal-bearing interval is preserved.
The area between the outer and inner polygon shows where the
coal-bearing rocks are partially eroded. The northern
boundary is delineated by the Paunsaugunt fault and volcanic
rocks of Tertiary age.