The Harrodsburg Limestone is a

geologic formation A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exp ...

, a member of the Sanders Group of

Indiana Limestone Indiana limestone — also known as Bedford limestone in the building trade — has long been an economically important building material, particularly for monumental public structures. Indiana limestone is a more common term for Salem Limestone, ...

, of Mississippian age. It was named for

Harrodsburg Harrodsburg is a home rule-class city in Mercer County, Kentucky, United States. It is the seat of its county. The population was 9,064 at the 2020 census. Although Harrodsburg was formally established by the House of Burgesses after Boonesbo ...

in southern

Monroe County, Indiana Monroe County is a county in the U.S. state of Indiana. In 1910 the US Census Bureau calculated the nation's mean population center to lie in Monroe County. The population was 137,974 at the 2010 United States Census. The county seat is Bloomin ...

by T. C. Hopkins and C. E. Siebenthal ("''The Bedford Oolitic Limestone of Indiana''" - 1897). It is made up primarily of

calcarenite Calcarenite is a type of limestone that is composed predominantly, more than 50 percent, of detrital (transported) sand-size (0.0625 to 2 mm in diameter), carbonate grains. The grains consist of sand-size grains of either corals, shells, ooi ...

and

calcirudite Calcirudite is a type of limestone that is composed predominantly, more than 50 percent, of carbonate grains that are larger in size than sand (2 mm in diameter). The grains can consist of either fragments of fossils, fragments of older limesto ...

. It also may include some beds of

dolomite Dolomite may refer to: *Dolomite (mineral), a carbonate mineral *Dolomite (rock), also known as dolostone, a sedimentary carbonate rock *Dolomite, Alabama, United States, an unincorporated community *Dolomite, California, United States, an unincor ...

and shale. Harrodsburg Limestone is found throughout the part of the Illinois Basin running through southern

Indiana Indiana () is a U.S. state in the Midwestern United States. It is the 38th-largest by area and the 17th-most populous of the 50 States. Its capital and largest city is Indianapolis. Indiana was admitted to the United States as the 19th s ...

References

External links

Indiana Geological Survey explanation of Harrodsburg Limestone
Carboniferous Indiana Carboniferous Kentucky Carboniferous southern paleotropical deposits {{Kentucky-geologic-formation-stub

See also

References

External links