A Marcellus Shale well site in Pennsylvania (IMAGE)

Penn State

A Marcellus Shale well site in Pennsylvania

Caption

A Marcellus Shale well site in Pennsylvania. 

Credit

Penn State

Usage Restrictions

Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted.

License

CC BY-NC-ND

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