https://www.netl.doe.gov/File%20Library/Research/Oil-Gas/shale-gas-primer-update-2013.pdf
2013 overview of the shale gas plays
https://www.netl.doe.gov/File%20Library/Research/Oil-Gas/shale-gas-primer-update-2013.pdf
2013 overview of the shale gas plays
This will be more helpful if you post in the County and State where it belongs.