http://gallery.usgs.gov/images/logos/usgs_only.jpg USGS Multimedia Gallery Collection for: Geology http://gallery.usgs.gov/ en-us OC_Web@usgs.gov (Office of Communications Web Group) http://gallery.usgs.gov/images/USGS.gif USGS http://gallery.usgs.gov/ <![CDATA[An outcropping of the Anastasia limestone formation seen along the shoreline of Blowing Rocks Preserve at low tide.]]> http://gallery.usgs.gov/photos/01_30_2009_dix3COn00U_10 <![CDATA[A close-up of the outcropping of the Anastasia limestone formation seen along the shoreline of Blowing Rocks Preserve at low tide.]]> http://gallery.usgs.gov/photos/01_30_2009_dix3COn00U_11 <![CDATA[Rock outcroppings in the prairie north of Concho Billy Trail, in Big Cypress National Preserve.]]> http://gallery.usgs.gov/photos/n63Umy8LKf_14