Illinois. Dept. of Public Works and Buildings, Service, C. M · Springfield, Ill. : Schnepp & Barnes, printers · leaf 49
about two miles westof the western end of the park along the banks of the Vermilion River. The Coal Measures—A series of shales, sandstones, limestones,and coal seams constitute what is known as the Pennsylvania form-ation, or, as it is sometimes called, the Coal Measures. Within thearea of the… … 47
