Complex sentence: In New York State, it thickens from 250 feet near Lake Erie to over 2,500 feet in Ulster and Greene counties, with depths ranging from outcrops to 8,000 feet below the surface of Sullivan County, in the southeastern part of the state.
Split into simpler sentences: In New York State, it thickens from 250 feet near Lake Erie to over 2,500 feet in Ulster and Greene counties. Depths ranging from outcrops to 8,000 feet below the surface of Sullivan County, in the southeastern part of the state.