This is a polygon coverage containing eleven different attributes of information including net coal thickness and estimated coal tonnages in the Calico and A-sequences in the Kaiparowits Plateau study area. This layer was derived from a "union" process, i.e., intersection and overlay of numerous layers and retaining attributes of each. It is the result of computing the geometric intersection of ten polygon coverages using the Environmental Systems Research Institute, Inc. (ESRI) Arc/Info UNION command, and finally calculating coal tonnage in INFO. Net coal thickness values are from 209 data points and represent all coal beds that are more than 1 foot thick.CARE SHOULD BE TAKEN IN USING THE COAL THICKNESS AND COAL TONNAGE VALUES CONTAINED IN THIS COVERAGE. Tonnage values in hypothetical areas (item REL = 'hypo' for "hypothetical reliability") reflect decreased levels of accuracy for calculated resources based on their distance from a data point. Isolines over areas where coal-bearing strata are eroded (item INT = 'P' for "partial interval") represent restored values. Limitations of the net coal method used to calculate these resources characterize this data set as being a GUIDE TO WHERE THE THICKEST NET COAL AREAS ARE LIKELY TO BE. This data set serves as an overall picture of the distribution and relative amount of coal. This coverage represents coal distribution and resources based on the available data. This data set cannot be used for mine planning or to calculate reserves. Additional work is required to determine the mineability and economics of these coal deposits.The outside polygon defines the base of the coal-bearing John Henry Member of the Straight Cliffs Formation east of 112 degrees of longitude. The northern boundary is delineated by the Paunsaugunt fault and volcanic rocks of Tertiary age. The area within this polygon includes parts of the coal-bearing John Henry Member where the entire stratigraphic section may not be represented due to erosion. Therefore, total coal values shown over the eroded areas represent restored net coal thicknessess.
