claim: Granite is a solid.
evidence: Ludlow is an unincorporated community in Allamakee County , Iowa , United States .. United States. United States. Iowa. Iowa. County. List of counties in Iowa. Allamakee. Allamakee County, Iowa. unincorporated community. Unincorporated area. Allamakee County. Allamakee County, Iowa. Ludlow is located on Iowa Highway 51 5.5 mi west-southwest of Waukon .. Iowa. Iowa. Iowa Highway 51. Iowa Highway 51. Waukon. Waukon, Iowa. A post office was opened in Ludlow in 1869 , and remained in operation until it was discontinued in 1875 .