rock oil

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

From The Wall Street Journal ● Apr. 8, 2014

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

Girl in Tranquilla convent that nun told me liked to smell rock oil.

From Ulysses by James Joyce

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 oil mentioned in the next line, is that called the rock oil, petroleum, a black fetid mineral oil, good for bruises and sprains.

From The Lusiad or The Discovery of India, an Epic Poem by Luís de Camões