Natural Gas
The impervious limestone layers of the Onondaga directly below the Marcellus, and the Tully Limestone at the top of the Hamilton Group, have trapped valuable natural gas reserves in this formation. The gas is produced by thermogenic decomposition of organic materials in the sediments under the high temperature and pressure generated after the formation was buried deep below the surface of the earth. The rock holds most of the gas in the pore spaces of the shale, with vertical fractures or joints providing additional storage as well as pathways for the gas to flow; gas is also adsorbed on mineral grains, and the carbon in the shale.
Read more about this topic: Marcellus Formation, Economic Impact
Famous quotes containing the words natural and/or gas:
“A person who can’t pay gets another person who can’t pay to guarantee that he can pay. Like a person with two wooden legs getting another person with two wooden legs to guarantee that he has got two natural legs. It don’t make either of them able to do a walking-match.”
—Charles Dickens (1812–1870)
“Papa died in the gas chamber,
slipping blue as an undressed minnow,
gulping in the shower to wash the Jew off him.”
—Anne Sexton (1928–1974)