Useful Links

U.S. Geological Survey
http://www.usgs.gov/

Pennsylvania DCNR
http://www.dcnr.state.pa.us/

Pennsylvania DEP
http://www.depweb.state.pa.us/portal/server.pt/community/dep_home/5968

Bureau of Topographic and Geologic Survey
http://www.dcnr.state.pa.us/topogeo/

West Virginia Geologic and Economic Survey
http://www.wvgs.wvnet.edu/

New York State DEC, Oil & Gas
http://www.dec.ny.gov/energy/205.html

Ohio DNR Division of Oil and Gas Resources
http://oilgas.ohiodnr.com/