. First deployed on a large scale in
Texas’s Barnett Shale, the technique has subsequently been adapted to a range of shales in other
parts of the country, each of which has its own geological distinctions. When natural gas prices
shot upward after 2005, the shale ―gold rush‖ was on. The largest gas-bearing shale formation,
the Marcellus Shale, extends across five states from West Virginia to New York, and is attracting
great attention in the northeastern region where energy prices are high and most gas is imported
from over 1,000 miles away