Ellettsville, Monroe County, Indiana – Oölitic Limestone Quarries – "Indiana Oölitic Limestone: Geology, Quarries, Methods," by George D. Hunter, Bloomington, Indiana, in Mine and Quarry, Vol. V, No. 1, July 1910, pp. 410-419. The article begins: "The Indiana Oölitic limestone district extends from a point near Greencastle on the north, to …