U.S. oil and gas field maps: The following national map portrays the location of fields identified as being among the 100 largest oil and/or 100 largest gas fields in the U.S. on December 31, 2009. The 100 Volumetrically Largest U.S. Oil and Gas Fields (12/7/2010) The following letter size maps portray the same information by product. More @Wikipedia
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