Digging Deep
What’s more, the Soviets were aiming for a depth of some 49,000 feet below the surface of the Earth. And researchers started to dig a series of boreholes, forking off from a single main cavity, using specialist equipment. But as they slowly worked their way down, America’s prospectors made some of their own gains.
Digging Deep
ADVERTISEMENT
Bertha Rogers Hole
In 1974, the Lone Star Producing Company drilled for oil in western Oklahoma’s Washita District. The firm created the “Bertha Rogers hole” in the process – a man-made wonder that reached more than 31,400 feet, or nearly six miles, below the earth’s surface.
Bertha Rogers Hole
