WELLS A MILE DEEP.
The deepest well in the world is in Upper Silesia, in tho German Empire. It is a diamond-drill hole in a coal field and is 7350 ft deep. A well in the United States which may go deeper, according to the United States Geological Survey, is four miles north-west of McDonald, Penn., and about 15 miles west of Pittsburg. This well, which is being sunk to the Medina sandstone — a bed that elsewhere contains oil and g as —i s now 7474 ft deep. Some gas and oil were struck in the upper part of the well. Between the depths of 6830 ft and 7100 ft, rocks bearing rock salt and salt water were encountered. These are regarded as of Salina age, the same as those carrying rock salt in Western New York. The temperature in this well at the depth of 6775 ft, as recently determined with great accuracy, is 145.8 deg. Fahrenheit.
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Bibliographic details
Ashburton Guardian, Volume XLIII, Issue 9836, 2 April 1923, Page 3
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158WELLS A MILE DEEP. Ashburton Guardian, Volume XLIII, Issue 9836, 2 April 1923, Page 3
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