Marcellus shale, near Marcellus New York, source of natural gas , subject of fracking controversy
Marcellus shale, near Marcellus, New York, source rock of huge quantities of natural gas and subject of the "fracking" controvercy, showing slickenside,(polished surface), where it slid past another rock in a fault
Size: 5759px × 3840px
Photo credit: © John Cancalosi / Alamy / Afripics
License: Licensed
Model Released: No
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