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
Eastern mole and the second part, "mole" is from the Middle English "molle" which in turn is related to another Middle English word, "mold-warpe", which means "earth-thrower". Fossil remains have been reported from the upper Ohio Valley in Pennsylvania and West Virginia, and Pleistocene cave faunas in Texas. Moles till and form soil, feed on destructive insects such as cutworms and Japanese beetles, and dig tunnels that aerate the soil and permit moisture to penetrate deeper soil layers. The pelt is small and does not take dyes well; it is thus of no commercial interest to the fur industry. When moles disfigure