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At issue now is the Monterey Shale, a formation holding more shale oil than anywhere else in the country.
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The enormous pressure of the shale formation sends oil and gas gushing out the well when it is first fracked.
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The dramatic migration pattern can be chalked up to the rapid development of an oil- and gas-rich shale formation in the western part of the state.
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Ohio also has the Utica Shale, another formation rich in oil and gas.
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Of course, we are now seeing speculation that the Cline Shale formation in West Texas may well contain more oil than the Eagle Ford, so that distinction could be short-lived.
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High oil prices and improved horizontal drilling techniques made oil production in tight oil plays like the Eagle Ford Shale in Texas and the Bakken Formation in North Dakota economical for the first time.
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Rather, as a consequence of injecting water and sand into the shale formation to crack the rocks so gas and oil will flow, massive amounts of waste water comes back to the surface with significant amounts of contaminants as a result of leaching out salt, heavy metals and trace amounts of radioactive materials from the rock formation itself.
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Another find, the Green River formation in Wyoming, could contain an astounding 1.4 trillion barrels of oil shale.
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