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 ...
.
See also
*
List of fossiliferous stratigraphic units in Indiana
This article contains a list of fossil-bearing stratigraphic units in the state of Indiana, U.S.
Sites
See also
* Paleontology in Indiana
References
*
{{DEFAULTSORT:Fossiliferous stratigraphic units in Indiana
Indiana
Indiana ...
*
List of fossiliferous stratigraphic units in Kentucky
This article contains a list of fossil-bearing stratigraphic units in the state of Kentucky, U.S.
Sites
See also
* Paleontology in Kentucky
References
*
{{DEFAULTSORT:Fossiliferous stratigraphic units in Kentucky
Kentucky
Ken ...
References
*
External links
Indiana Geological Survey explanation of Harrodsburg Limestone
Carboniferous Indiana
Carboniferous Kentucky
Carboniferous southern paleotropical deposits
{{Kentucky-geologic-formation-stub