1.27 Sedimentary Rocks Exploration

The Shawangunk Ridge also known as the Shawangunk Mountains or The Gunks is a ridge of bedrock in Ulster County, Sullivan County and Orange County in the state of New York, extending from the northernmost point of New Jersey to the Catskill Mountains. Shawangunk Ridge is the continuation of the long, easternmost ridge of the Appalachian Mountains. In the past, the ridge was chiefly noted for mining and logging and a boom-era of huckleberry picking. Fires were regularly set to burn away the undergrowth and stimulate new growth of huckleberry bushes. Today the ridge has become known for its outdoor recreation, most notably as one of the major rock climbing areas of North America. The ridge is made primarily of Shawangunk Conglomerate, a hard, silica-cemented conglomerate of white quartz pebbles and sandstone that directly overlies the Martinsburg Shale, a thick turbidite sequence of dark gray shale and greywacke sandstone. The Martinsburg Shale was deposited in a deep ocean during the Ordovician (470 million years ago).