: solid material ejected into the air during a volcanic eruption
especially
: ash entry 2 sense 2b
Examples of tephra in a Sentence
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Gas emissions and rock fragments ejected from the volcano into the air, known as tephra, were the primary hazards from the eruption, the observatory said.
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Alex Sundby, CBS News, 4 June 2024
Volcanoes are vents where lava, tephra, and steam erupt onto the Earth's surface.
—Lea Lane, Forbes, 29 Mar. 2024
Lava flows, hydrated mineral deposits as well as pyroclastic deposits made of volcanic particulate materials such as ash, cinders, pumice and tephra, occur in several areas within the structure’s perimeter.
—Michael Dorgan, Fox News, 15 Mar. 2024
First, explosive volcanic eruptions produce tephra, with is a bit of a catch-all for volcanic debris like ash, pumice, bombs, etc.
—Erik Klemetti, Discover Magazine, 30 May 2023
See all Example Sentences for tephra 
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Alex Sundby, CBS News, 4 June 2024
Volcanoes are vents where lava, tephra, and steam erupt onto the Earth's surface.
—Lea Lane, Forbes, 29 Mar. 2024
Lava flows, hydrated mineral deposits as well as pyroclastic deposits made of volcanic particulate materials such as ash, cinders, pumice and tephra, occur in several areas within the structure’s perimeter.
—Michael Dorgan, Fox News, 15 Mar. 2024
First, explosive volcanic eruptions produce tephra, with is a bit of a catch-all for volcanic debris like ash, pumice, bombs, etc.
—Erik Klemetti, Discover Magazine, 30 May 2023
See all Example Sentences for tephra
Dictionary Entries Near tephra
Cite this Entry
“Tephra.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tephra. Accessed 8 Nov. 2024.
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