rock oil

But by fracking the rock, oil flowed from the shale.

From The Wall Street Journal ● Apr. 8, 2014

So far, Bissell's enterprise seemed to promise success, yet the great problem still remained: how could he obtain this rock oil in amounts large enough to make his enterprise a practical one?

From The Age of Big Business; a chronicle of the captains of industry by Burton Jesse Hendrick

Then came the great discovery of rock oil, which rapidly superseded the whale oil of commerce in general use.

From Equatorial America Descriptive of a Visit to St. Thomas, Martinique, Barbadoes, and the Principal Capitals of South America by Maturin Murray Ballou

There are likewise springs of rock oil or bitumen.

From A General History and Collection of Voyages and Travels — Volume 02 Arranged in Systematic Order: Forming a Complete History of the Origin and Progress of Navigation, Discovery, and Commerce, by Sea and Land, from the Earliest Ages to the Present Time by Robert Kerr

His report was so favorable that a company was formed, which leased all the land along Oil Creek upon which were traces of the new rock oil.

From Inventors by Philip Gengembre Hubert