shale

noun

: a fissile rock that is formed by the consolidation of clay, mud, or silt, has a finely stratified or laminated structure, and is composed of minerals essentially unaltered since deposition
shaley adjective
or less commonly shaly

Examples of shale in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In the Permian basin of New Mexico and west Texas, for example, producers can more quickly and economically ramp up extraction of light crude oil trapped in shale rock. Los Angeles Times, 14 Mar. 2026 Higher fuel prices are beneficial for shale refiners. Priyanka Salve, CNBC, 11 Mar. 2026 The company purchases natural gas from the Transco and Columbia Gas Transmission pipelines connected to major shale production regions, including the Marcellus and Utica deposits which stretch from West Virginia to Canada and the Haynesville deposit which spans Texas, Louisiana and Arkansas. Nora O'Neill, Charlotte Observer, 10 Mar. 2026 While the shale revolution — with new fracking methods extracting more oil from Texas, New Mexico and North Dakota — has pushed the US to become the biggest oil producer in the world, this country has learned the hard way that not all oil is the same. Ella Nilsen, CNN Money, 9 Mar. 2026 See All Example Sentences for shale

Word History

Etymology

probably from obsolete or dialect shale scale, shell, from Middle English, from Old English scealu — more at shell

First Known Use

1747, in the meaning defined above

Time Traveler
The first known use of shale was in 1747

Browse Nearby Words

Cite this Entry

“Shale.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/shale. Accessed 16 Mar. 2026.

Kids Definition

shale

noun
: a rock with a fine grain formed from clay, mud, or silt
shaley adjective

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