<Table> <Tr> <Th> Rank </Th> <Th> Field </Th> <Th> State </Th> <Th> Discovery Year </Th> <Th> Billion cubic ft. / Year </Th> </Tr> <Tr> <Td> </Td> <Td> Marcellus natural gas trend </Td> <Td> Pennsylvania and West Virginia </Td> <Td> 2008 </Td> <Td> 2,836 </Td> </Tr> <Tr> <Td> </Td> <Td> Newark East Barnett Shale </Td> <Td> Texas </Td> <Td> 1981 </Td> <Td> 1,952 </Td> </Tr> <Tr> <Td> </Td> <Td> Haynesville Shale </Td> <Td> Louisiana and Texas </Td> <Td> 2008 </Td> <Td> 1,426 </Td> </Tr> <Tr> <Td> </Td> <Td> Eagle Ford Formation </Td> <Td> Texas </Td> <Td> 1962 </Td> <Td> 1,112 </Td> </Tr> <Tr> <Td> 5 </Td> <Td> Fayetteville Shale </Td> <Td> Arkansas </Td> <Td> 2005 </Td> <Td> 1,025 </Td> </Tr> <Tr> <Td> 6 </Td> <Td> San Juan Basin </Td> <Td> New Mexico and Colorado </Td> <Td> 1927 </Td> <Td> 1,025 </Td> </Tr> <Tr> <Td> 7 </Td> <Td> Carthage </Td> <Td> Texas </Td> <Td> 1936 </Td> <Td> 653 </Td> </Tr> <Tr> <Td> 8 </Td> <Td> Pinedale Gas Field </Td> <Td> Wyoming </Td> <Td> 1955 </Td> <Td> 568 </Td> </Tr> <Tr> <Td> 9 </Td> <Td> Sprayberry </Td> <Td> Texas </Td> <Td> 1949 </Td> <Td> 307 </Td> </Tr> <Tr> <Td> 10 </Td> <Td> Wattenberg Gas Field </Td> <Td> Colorado </Td> <Td> 1970 </Td> <Td> 305 </Td> </Tr> <Tr> <Th colspan="5"> Annual production 2013 . Source : </Th> </Tr> </Table>
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Pennsylvania West Virginia Texas Louisiana Arkansas New Mexico Colorado Wyoming