rock oil
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
But by fracking the rock, oil flowed from the shale.
From The Wall Street Journal ● Apr. 8, 2014
Both Townsend and Drake would have died richer men had they never heard of the Pennsylvania rock oil.
From Inventors by Philip Gengembre Hubert
From such processes the so-called hydrocarbons, rock oil and natural gas, have accumulated.
From Earth and Sky Every Child Should Know Easy studies of the earth and the stars for any time and place by Julia Ellen Rogers
The gold mines of California and of Australia are too well known to require mention; but we must not forget the rock oil, concealed for ages in the North American continent.
From The Mines and its Wonders by William Henry Giles Kingston
It has in one part a spring of petroleum or rock oil, and one of its mountains is a volcano.
