Try this site for more information on Mark Annis. The Watehung Mountains were formed of volcanic basalt which is non-porous. Water travels along the surface of the basalt until it hits the water table in the strati-fied shale where wells are based. Likewise. oil flows along the same path making its way deep into the water table. A small leakage in this area be-comes a ludicrous problem, Mr. Mark Annis said.