ABSTRACT: The availability of coal resources in the Santa Claus 7.5 Minute Quadrangle in southwest Indiana was examined in this study. Total original, remaining and available resources were calculated for eight coal beds underlying the study area. In ascending stratigraphic order, the eight coal beds which belong to the Raccoon Creek Group of the Pennsylvanian System are Mariah Hill Coal Member and the unnamed Mansfield coal of the Mansfield Formation; unnamed Brazil coal, Upper Block Coal Member, and the Buffaloville Coal Member of the Brazil Formation; and three unnamed Staunton coals of the Staunton Formation. Resources were calculated by assigning each coal data point to one of two coal thickness categories, "14-28 inches," or "greater than 28 inches," and to one of two overburden categories, "0-100 feet" or "100-1000 feet." In addition, each coal data point was characterized by four reliability categories (circles): measured (0-0.25 miles from the data point), indicated (0.25-0.75 miles), inferred (0.75-3.0 miles), and hypothetical (3.0-10.0 miles). The reliability categories express the relative confidence in finding coal at a particular location based upon distance from a data point. The eight coal beds comprised 113 million short tons on total original resources in the study area. Of the 113 million short tons, 9 million short tons have been removed by mining or lost in the mining process, thus leaving 104 million short tons of remaining resources. Because of land-use and technological restrictions, 57 million short tons (50% of the original resources or 54% of the remaining resources) are available for mining in the area.
Conolly, C. L., Cetin, H. 1995, The coal availability study in Indiana: Santa Claus 7.5 minute quadrangle: Indiana Geological Survey Open-File Study 95-04, 83 p., 46 fig.
Notes: Publications in the Indiana Geological Survey Open-File series have been inconsistently named using a variety of series titles including "Open-File Report," "Open-File Map," and "Open-File Study." Prior to 1994, a publication in this series was generally referred to as an "Open-File Report" (but not always). To help reduce confusion created by these inconsistencies, the IGS now refers to every publication in the Open-File series as an "Open-File Study." To be entirely correct in writing a bibliographic reference for a publication, one should use the series name and number that appears on the publication itself.
Final Report to the United States Geological Survey.
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Keywords: coal, energy resources, Raccoon Creek Group, Pennsylvanian, Mariah Hill Coal Member, Mansfield Formation, Upper Block Coal Member, Buffaloville Coal Member, Brazil Formation, Staunton Formation
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