Whaleback Anticline, Shamokin, PA.

NASA Earth Science Picture of the Day for 11 January 2008.

http://epod.typepad.com/blog/2008/01/whaleback-anticline.html

http://www.dcnr.state.pa.us/topogeo/pnhp/whaleback.aspx

http://www.dcnr.state.pa.us/topogeo/photogallery/whale.aspx

http://www.geosc.psu.edu/~engelder/geosc465/Trip2.rtf

http://www.geo.cornell.edu/geology/classes/RWA/GS_326/photo_galleries/bear_valley_field_trip/

Copyright Dave Kerr, 2007.