'''Energy exploration''' is the search for [[oil]] and [[natural gas]] underground.<ref>"Exploration Production is the process of recovering those hidden resources for processing, marketing and use." [http://www.adventuresinenergy.org/exploration-and-production/ Adventures in Energy] - [[American Petroleum Institute]]</ref>
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'''Energy exploration''' is the search for [[oil]] and [[natural gas]] underground.<ref>"Exploration Production is the process of recovering those hidden resources for processing, marketing and use." [http://www.adventuresinenergy.org/exploration-and-production/ Adventures in Energy] - [[American Petroleum Institute]]</ref> A major technique is to conduct a seismic survey to determine the depth of rock layers that may contain hydrocarbons.<ref>{{cite news|url=http://parkseismic.com/Whatisseismicsurvey.html|title=What is seismic survey?|accessdate=March 20, 2014}}</ref> Prior to 1980, geologist would look for porous rock formations and avoid drilling in shale or other non-porous layers. However, with the advent of [[fracking]], oil and gas is produced from shale, bringing energy exploration to many areas of the United States for the first time.