Item Number: OFS95-02
Map Scale: 1:55,555

ABSTRACT: The availability of coal resources in the Center Point 7.5 Minute Quadrangle in west-central Indiana was examined in this study. Total original, remaining, and available resources were calculated for three coal beds underlying the study area. In ascending stratigraphic order, the three coal beds which belong to the Raccoon Creek Group of the Pennsylvanian System are the Lower Block, Upper Block, and Minshall Coal Members of the Brazil Formation. Resources were calculated by assigning each coal data point to one of the two overburden thickness categories, "14-28 inches", or "greater than 28 inches" and to one of two overburden categories, "0-1000 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 three coal beds comprised 133 million short tons of total original resources in the study area. Of the 133 million short tons, 28 million short tons have been removed by mining or lost in the mining process, thus leaving 105 million short tons of remaining resources. Because of land-use and technological restrictions, 75 million short tons (57% of the original resources or 72% of the remaining resources) are available for mining in the area.

Cetin, H., Conolly, C. L., Rupp, J. A. 1995, The coal availability study in Indiana: Center Point 7.5 minute quadrangle: Indiana Geological Survey Open-File Study 95-02, 48 p., 28 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, Pennsylvanian, Lower Block Coal Member, Upper Block Coal Member, Minshall Coal Member, resource, Raccoon Creek Group, Brazil Formation

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