Carbonate mud bodies in Middle Mississippian strata of southern Indiana and northern Kentucky; end members of a Middle Mississippian mud mound spectrum?

algae bedding plane irregularities Arthropoda carbonate rocks Mississippian Ostracoda Plantae Carboniferous Crustacea microfossils Ramp Creek Formation Harrodsburg Limestone Kentucky Mandibulata Illinois Basin Indiana Paleozoic sedimentary rocks United States Middle Mississippian sedimentary structures stratigraphy thallophytes Invertebrata mud lumps