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  1. 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.

  2. 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 …

  3. 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 …

  4. 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 …

  5. PYROCLAST Definition & Meaning - Merriam-Webster

    The meaning of PYROCLAST is a fragment of detrital volcanic material that has been expelled aerially from a vent.

  6. 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 …

  7. 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 …