Lock Haven Formation

The Lock Haven Formation (abbreviated Dlh) is a Devonian mapped bedrock unit in Pennsylvania, in the United States. It is gray to green-brown siltstone and shale and is over 400 million years old. It is located in northcentral Pennsylvania and can be seen at the base of the Pine Creek Gorge. It is found below the Catskill Formation.cite book | last = Owlett | first = Steven E. | title = Seasons Along The Tiadaghton: An Environmental History of the Pine Creek Gorge | date = 1993 | chapter = Of Brachiopods and Glaciers | pages = pp. 27-38 | edition = 1st Edition | publisher = Interprint | location = Petaluma, California | id = ISBN 0-9635905-0-2 ] cite web| url = http://www.dcnr.state.pa.us/topogeo/map61/tiadaghton.pdf | title = Atlas of Preliminary Geologic Quadrangle Maps of Pennsylvania: Tiadaghton | accessdate = 2008-08-05 | author = Berg, T. M. |publisher = Pennsylvania Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey | date = 1981 | format = PDF] [cite web | url = http://www.dcnr.state.pa.us/topogeo/pub/map/pdfs/map067_tabloid_exp.pdf |title = "Map 67: Tabloid Edition Explanation" |publisher = Pennsylvania Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey |format = PDF]

References

ee also

*Geology of Pennsylvania