In the Eastern Panhandle of West Virginia, about one mile west of Charles Town, Jefferson County, on the Piedmont and Altona Farms, known by the same name as the Farms, there is a calcareous Marsh of some fifty acres, formed at a low point in limestone farm land areas of Evitts Run. This run is a meandering stream, about seven feet wide and one foot deep, passing through and finally reaching the Shenandoah River about six miles to the southeast. The Baltimore and Ohio Railroad grade has formed the northern boundary of the Marsh since 1832 and aids in impounding water, thus creating a pond situation of about one fourth acre. The remaining Marsh, on visits in May, June, August and November 1967, was always found to have the practically flat ground covered with about four inches of water. There are many limestone springs draining into the Marsh; and since marl, a soft lime compound mixed with clay, has been mined for agricultural use from the earth farther up stream, it is thought that this type formation may underlie the Marsh.