geological

adjective

geo·​log·​i·​cal ˌjē-ə-ˈlä-ji-kəl How to pronounce geological (audio)
variants or less commonly geologic
: of, relating to, or based on geology
geologically adverb

Examples of geological 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.
Also playing a role are the obstacles due to economics, the history and geological technicalities, which could take up to three years to secure. Letters To The Editor, The Orlando Sentinel, 10 Jan. 2026 The area impacted by the earthquake is roughly about 225 miles northeast of Phoenix, according to the federal geological survey site. Jose R. Gonzalez, AZCentral.com, 9 Jan. 2026 By increasing effective gravity, researchers can accelerate years or even decades of structural and geological stress into just a few hours, enabling experiments that would be impractical in the real world. New Atlas, 7 Jan. 2026 Gulf countries and Venezuela share a geological bond, with both sitting on huge oil reserves, but the US capture of Nicolás Maduro has almost no impact on the region — at least not directly, and certainly not for now. Mohammed Sergie, semafor.com, 5 Jan. 2026 In August, scientists revealed that another geological anomaly in the mantle — a mass of hot rock that sits about 124 miles (200 kilometers) beneath the Appalachian Mountains range in New England — was formed about 80 million years ago when Greenland and North America split apart. Katie Hunt, CNN Money, 29 Dec. 2025 Identifying a suitable location for a deep geological nuclear facility is as complex as the construction itself, requiring vast, stable rock formations capable of safely enclosing an underground repository. Bojan Stojkovski, Interesting Engineering, 27 Dec. 2025 Computer simulations showed that any methane on TRAPPIST-1e would be rapidly destroyed by intense ultraviolet radiation, surviving only about 200,000 years — not nearly long enough for geological processes to replenish it. Sharmila Kuthunur, Space.com, 26 Dec. 2025 But if the geological plumbing is clogged, perhaps by silica minerals or rock debris, the pressure can build until the water explodes, vaporizing into steam and shooting boiling water, mud, rocks, and other debris into the air. Owen Clarke, Outside, 23 Dec. 2025

Word History

Etymology

see geology

First Known Use

circa 1723, in the meaning defined above

Time Traveler
The first known use of geological was circa 1723

Browse Nearby Words

Cite this Entry

“Geological.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/geological. Accessed 11 Jan. 2026.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!