Ernst H Kastning PhdErnst H. Kastning, PhD, is a consulting geologist and historian. During his 48-year career as a hydrogeologist and engineer, he taught at universities in Kentucky, Connecticut, and Virginia. He has explored, mapped, and studied caves in over 40 state, primarily Virginia, Texas, New York, and in New England. Kastning writes and lectures extensively on geology, speleology, and history. Read More Read Less