Description: <DIV STYLE="text-align:Left;"><DIV><P><SPAN>This data set is a point coverage of the public well data points of North-Zone 8, in feet, over extent of the North-Zone 8 coal and its horizon (stratigraphic equivalent) in Central Texas only. The 'coal_thick' and 'coal_top' category items for each public data point may not match values represented in the 'coal thickness' and 'top of coal structure' polygon data layers in the arcview project. The polygon data layers resulted from gridding which averages point values within cells and may not represent values present in the public point data.</SPAN></P></DIV></DIV>
Copyright Text: The stratigraphic data stored in the NCRDS has been submitted by State Geological Surveys and USGS scientists since its inception in the middle 1970's through state cooperative programs. The data for the North-Zone 8 coal bed was used with the permission and through the cooperation of coal geologists (primary contacts listed) at the State of Texas Bureau of Economic Geology and the State of Texas Railroad Commission