The North Dakota Petroleum Rush
In the late 1960's, I worked for a short time in the Williston, North Dakota, area when the previous oil boom was underway. That boom was big then, but the new petroleum rush in the Bakken Formation is enormous. The Bakken Formation contains twice the oil reserves of Saudi Arabia and three times as much as Texas. Recently developed "fracking" technology has made previously inaccessible petroleum open to drilling.