Dr. Robert Titus has revised and enlarged his guide to the geology of New York State"s Catskill Mountains for this thrid edition. Written for the layperson, the book explores the 400 million years of geological history hidden in the region"s rocks and landscapes. Here are stories of continental collisions, lost mountain ranges, and primitive fossil creatures in an ancient sea. Most of all it is the story of the land of Gilboa, literally a land that time has forgotten.