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- W137393105 abstract "Hydrologic and water-quality information from the coal region in parts of 11 counties in southwestern Indiana are summarized. Pennsylvanian and Mississippian bedrock are overlain by drift and till from the Kansan, Illinoian, and Wisconsinan glaciers that covered two-thirds of the area. Most of the coal is mined from Pennsylvanian coal units. As of 1978, more than 1-billion short tons of coal had been mined from the 11 counties. More than 12-billion short tons remained in reserve. During 1978, 17.8-million short tons were mined. Coal mining disturbs less than 1% of the land in the study area. Sixty-two percent of the land use is agricultural, and 29% is forested. More coal is mined in the southern and western parts of the study area than elsewhere. Surface water in these parts had lower pH and alkalinity than water in the north and east parts. Specific conductance and concentrations of sulfate, iron, and manganese in surface water were higher in the south and west than elsewhere. (USGS)" @default.
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- W137393105 date "1981-01-01" @default.
- W137393105 modified "2023-09-26" @default.
- W137393105 title "Hydrology of area 32, Eastern Region, Interior Coal Province, Indiana" @default.
- W137393105 doi "https://doi.org/10.3133/ofr81498" @default.
- W137393105 hasPublicationYear "1981" @default.
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