Harrodsburg limestone
Encyclopedia
Harrodsburg Limestone is a member of the Sanders Group of Indiana Limestone
, of Mississippian age. It was named for Harrodsburg, Indiana
in southern Monroe County, Indiana
by T. C. Hopkins and C. E. Siebenthal ("The Bedford Oolitic Limestone of Indiana" - 1897). It is made up primarily of calcarenite
and calcirudite
. It also may include some dolomite
and shale
.
Harrodsburg limestone is found throughout the part of the Illinois Basin
running through southern Indiana
Indiana Limestone
Indiana Limestone, also known as Bedford Limestone is a common regional term for Salem limestone, a geological formation primarily quarried in south central Indiana between Bloomington and Bedford....
, of Mississippian age. It was named for Harrodsburg, Indiana
Harrodsburg, Indiana
Harrodsburg is an unincorporated town in Clear Creek Township, Monroe County, Indiana. It population was 691 at the 2010 census.-History:Bloomington Telephone, August 11, 1883, p. 4.NEW JANE, Now Known as Harrodsburg...
in southern Monroe County, Indiana
Monroe County, Indiana
As of the census of 2010, there were 137,974 people, 46,898 households, and 24,715 families residing in the county. The population density was 306 people per square mile . There were 50,846 housing units at an average density of 129 per square mile...
by T. C. Hopkins and C. E. Siebenthal ("The Bedford Oolitic Limestone of Indiana" - 1897). It is made up primarily of calcarenite
Calcarenite
thumb|250px|The [[Pietra di Bismantova]] in central [[Italy]] is an example of calcarenite formation.Calcarenite is a type of limestone that is composed predominately, more than 50 percent, of detrital sand-size , carbonate grains...
and calcirudite
Calcirudite
Calcirudite is a type of limestone that is composed predominately, more than 50 percent, of carbonate grains that are larger in size than sand . The grains can consist of either fragments of fossils, fragments of older limestones and dolomites, other carbonate grains, or some combination of these...
. It also may include some dolomite
Dolomite
Dolomite is a carbonate mineral composed of calcium magnesium carbonate CaMg2. The term is also used to describe the sedimentary carbonate rock dolostone....
and shale
Shale
Shale is a fine-grained, clastic sedimentary rock composed of mud that is a mix of flakes of clay minerals and tiny fragments of other minerals, especially quartz and calcite. The ratio of clay to other minerals is variable. Shale is characterized by breaks along thin laminae or parallel layering...
.
Harrodsburg limestone is found throughout the part of the Illinois Basin
Illinois Basin
The Illinois Basin is a Paleozoic depositional and structural basin in the United States, centered in and underlying most of the state of Illinois, and extending into southwestern Indiana and western Kentucky...
running through southern Indiana
Indiana
Indiana is a US state, admitted to the United States as the 19th on December 11, 1816. It is located in the Midwestern United States and Great Lakes Region. With 6,483,802 residents, the state is ranked 15th in population and 16th in population density. Indiana is ranked 38th in land area and is...