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| Keywords: Hillseam.png en Profile of hillseam occurrence 1989-01-02 Sames G P and Moebs N N Hillseam Geology and Roof Instability Near Outcrop in Eastern Kentucky Drift Mines Report of Investigations 9267 page 6 figure 5 published by Bureau of Mines United States Department of the Interior Gary P Sames and Noel N Moebs other versions PD-USGov Stratigraphy of Kentucky Coal mining schemas and diagrams Uploaded with UploadWizard | ||||
