General Geology Report, Issues 65-67Bureau of Topographic and Geologic Survey., 1974 - Geology |
Contents
Introduction | 3 |
Lancaster County | 19 |
Organized Caving vii | |
Copyright | |
5 other sections not shown
Other editions - View all
General Geology Report, Issue 61 Pennsylvania. Bureau of Topographic and Geologic Survey No preview available - 1972 |
Common terms and phrases
15 feet 20 feet anthodites Appalachian aragonite bedding planes bedrock boulder caves breakdown Brison calcite carbonate cave consists cave development cave entrance cave is located cave passages Ceiling Height Chestnut Ridge clay Conestoga crawl crawlway Creek Cave cross section Dearolf deposits diabase dolomite downcutting drainage east Fayette County feet high feet long feet wide fissure floor flow flowstone Formation formed geological groundwater Hillside hole J. R. Reich joint karst Lancaster County Laurel Caverns leads limestone Loyalhanna limestone main passage Mifflin County miles mineral Mount Joy Mount Joy Cave Mummau Cave narrow National Speleological Society northwest occur opening outcrop Pennsylvania caves phreatic Pittsburgh Grotto Pleistocene Quarry Cave quarry wall region road Route sandstone sediments shale sink sinkhole slope solution southeast species Speleol speleothems springs stalactites Stone surface stream troglobites trogloxenes Valley Vanport vertical water table Westmoreland County zone