A seep is a wet place where a liquid, usually groundwater, has oozed from the ground to the surface. Seeps are usually not flowing, with the liquid sourced only from underground. The term seep may also refer to the movement of liquid hydrocarbons to the surface through fractures and fissures in the rock and between geological layers. Oil seeps are quite common: California has thousands of them. Much of the oil discovered in California during the 19th century was from observations of seeps. Seeps… (More on Seep)