
Pyroclastic rock - Wikipedia
Pyroclastic rocks are clastic rocks composed of rock fragments produced and ejected by explosive volcanic eruptions. The individual rock fragments are known as pyroclasts.
Pyroclasts and Pyroclastic Rocks - U.S. National Park Service
Apr 18, 2023 · Collectively, the fragments ejected during explosive eruptions are termed pyroclasts, meaning “fire-broken” from the ancient Greek. Pyroclasts may be ejected while still …
What are pyroclasts? | Volcano World | Oregon State University
Spatter (a type of pyroclast) is globs of lava thrown through the air that land while still molten. The word is a combination of “pyro” or fire, and “clastic” or made up of many pieces. Pyroclasts (or …
How Volcanoes Work - Tephra and Pyroclastic Rocks
Individual eruptive fragments are called pyroclasts ("fire fragments"). Tephra (Greek, for ash) is a generic term for any airborne pyroclastic accumulation. Whereas tephra is unconsolidated, a …
PYROCLAST Definition & Meaning - Merriam-Webster
The meaning of PYROCLAST is a fragment of detrital volcanic material that has been expelled aerially from a vent.
Pyroclastic flow | Definition, Examples, & Facts | Britannica
Pyroclastic flows have their origin in explosive volcanic eruptions, when a violent expansion of gas shreds escaping magma into small particles, creating what are known as pyroclastic …
Pyroclastic rocks | Research Starters | EBSCO Research
Pyroclastic rocks are formed from the accumulation of fragmental debris ejected during explosive volcanic eruptions. These high-energy events can occur on land or underwater and are often …