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:
“If, in looking at the lives of princes, courtiers, men of rank and fashion, we must perforce depict them as idle, profligate, and criminal, we must make allowances for the rich men’s failings, and recollect that we, too, were very likely indolent and voluptuous, had we no motive for work, a mortal’s natural taste for pleasure, and the daily temptation of a large income. What could a great peer, with a great castle and park, and a great fortune, do but be splendid and idle?”
—William Makepeace Thackeray (1811–1863)
“Droning a drowsy syncopated tune,
Rocking back and forth to a mellow croon,
I heard a Negro play.
Down on Lenox Avenue the other night
By the pale dull pallor of an old gas light”
—Langston Hughes (1902–1967)