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.
Finland is preparing to commission the world’s first deep geological repository for spent nuclear fuel, a facility designed to isolate radioactive material deep underground for extremely long periods. Kaif Shaikh, Interesting Engineering, 23 June 2026 In a 2005 interview with broadcaster Charlie Rose, Raymond repeated his attempts to link present-day climate change, which is far faster and more severe than at any time in the geological record, to natural causes rather than human activities like burning fossil fuels. Joe Árvai, The Conversation, 22 June 2026 Illinois has some of the largest reserves of coal in the country, with the energy equivalent of Saudi Arabia’s oil, according to the state’s geological survey. Adriana Pérez, Chicago Tribune, 22 June 2026 Ancient river valleys, lake beds, deltas and other geological features pointed to a wetter past, when liquid water flowed across the landscape. Sharmila Kuthunur, Space.com, 17 June 2026 The garnet is meant to highlight the state's geological heritage. Swasti Singhai, USA Today, 16 June 2026 Jordan remains a beloved location not only because of its awe-inspiring cultural and geological sites but also due to a dynamic film industry and highly skilled crews honed over decades of hosting international productions. Ed Meza, Variety, 15 June 2026 The city is in the Greater Zion region, which sits in a geological zone at the intersection of the Mojave Desert, Colorado Plateau, and Great Basin ecosystems. Tamara Gane, Travel + Leisure, 15 June 2026 At the resort, guests can join a marine biologist for immersive excursions through the 1,000-acre preserve surrounding Fort Clinch State Park, learning about the island's ecosystems, geological history, and the fossils that continue to wash ashore today. Alexandra Emanuelli, Southern Living, 12 June 2026

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 26 Jun. 2026.

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