River Mole River Mole The River Mole is a tributary of the River Thames in southern England. It rises in West Sussex near Horsham and flows northwest through Surrey for to the Thames at East Molesey, opposite Hampton Court Palace. The river gives its name to the Surrey district of Mole Valley. The Mole crosses the North Downs between Dorking and Leatherhead, where it cuts a steep-sided valley, known as the Mole Gap, through the chalk. Much of the catchment area lies on impermeable rock (including Wealden Clay and London Clay), meaning that the river level responds rapidly to heavy rainfall. During
Mole Hill (Virginia) Mole Hill (Virginia) Mole Hill is a rounded hill composed of basalt, a volcanic rock, formed during the Eocene epoch of the Paleogene period. It is the eroded remnant of what was an active volcano approximately 47 million years ago, making it one of the youngest volcanos on the east coast of North America. It is located west of Harrisonburg, VA, in Rockingham County. Mole Hill is an isolated, rounded, tree-covered "monadnock" in an otherwise relatively flat valley, surrounded by farmland. The peak of mole hill is approximately 1,893 feet (577 meters) above sea level. The basalt itself, outcropping at