K-T boundary
noun
: the transition between the Cretaceous and Tertiary periods of geologic time characterized by a mass extinction of many forms of life including the dinosaurs
also
: a geologic stratum marking this boundary
Examples of K-T boundary in a Sentence
Recent Examples on the Web
Kring was foundational in confirming the role of the Chicxulub crater’s impact event in the K-T boundary mass extinction.
—
Anna Funk, Discover Magazine, 14 Nov. 2018
These examples are automatically compiled from online sources to
illustrate current usage. Opinions expressed in the examples do not represent those of
Merriam-Webster or its editors.
Send us feedback
about these examples.
Anna Funk, Discover Magazine, 14 Nov. 2018
Dictionary Entries Near K-T boundary
Cite this Entry
“K-T boundary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/K-T%20boundary. Accessed 16 Nov. 2024.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share