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.
Brandywine Falls, a spectacle that sends water soaring down 60 feet of shale and sandstone, is arguably the park’s most popular attraction. Stephanie Vermillion, Travel + Leisure, 5 Dec. 2025 Except for some small regions near the Mississippi River, Eau Claire shale is considerably thick – more than 300 feet (90 meters) – throughout most of the Illinois basin. Ramesh Agarwal, The Conversation, 2 Dec. 2025 Fossil fuel production from this enormous shale deposit has boomed over the past decade, putting it on track to produce more than a million barrels a day by 2030, analysts predict. Laura Paddison, CNN Money, 10 Nov. 2025 Oil market dynamics have opened a window for OPEC+ to claw back market share lost to US shale, investors and experts said on the sidelines of a Gulf energy conference, with expectations growing that the group will increase supply despite short-term price pressure. semafor.com, 2 Oct. 2025 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 17 Dec. 2025.

Kids Definition

shale

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

More from Merriam-Webster on shale

Last Updated: - Updated example sentences
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