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.

Drake had been hoping to find "rock oil", a brownish unrefined "crude" oil that sometimes bubbled near the surface of western Pennsylvania.

From BBC

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 Project Gutenberg

Then came the great discovery of rock oil, which rapidly superseded the whale oil of commerce in general use.

From Project Gutenberg

No. On all bearings the same oil, but on mainspring a rock oil.

From Project Gutenberg

From such processes the so-called hydrocarbons, rock oil and natural gas, have accumulated.

From Project Gutenberg