Glossary of volcanic terms. - University of Wisconsin Oshkosh. G. J. Hudak. 2001.
Pyroclastic fall — A pyroclastic fall is a uniform deposit of material which has been ejected from an eruption or plume such as an ash fall or tuff. Pyroclastic flows occur relatively spontaneously in the geological time scale and are great indicators of time.… … Wikipedia
Pyroclastic rock — Pyroclastic rocks or pyroclastics (derived from the Greek πῦρ , meaning fire, and κλαστός , meaning broken) are clastic rocks composed solely or primarily of volcanic materials. Where the volcanic material has been transported and reworked… … Wikipedia
Pyroclastic flow — Pyroclastic flows sweep down the flanks of Mayon Volcano, Philippines, in 1984 … Wikipedia
pyroclastic flow — ▪ volcanism in a volcanic eruption, a fluidized mixture of hot rock fragments, hot gases, and entrapped air that moves at high speed in thick, gray to black, turbulent clouds that hug the ground. The temperature of the volcanic gases can… … Universalium
Mount Meager — The Mount Meager volcanic complex rising above the Pemberton Valley. Summits left to right are Capricorn Mountain, Mount Meager proper and Plinth Peak … Wikipedia
Ignimbrite — is a volcanic pyroclastic rock, often of dacitic or rhyolitic composition. Ignimbrite is the deposit of a pumice rich pyroclastic density current, or pyroclastic flow , a hot suspension of particles and gases that flows rapidly from a volcano,… … Wikipedia
Phreatomagmatic eruption — Phreatomagmatic eruptions are defined as juvenile forming eruptions as a result of interaction between water and magma. They are different from magmatic and phreatic eruptions. The products of phreatomagmatic eruptions contain juvenile clasts,… … Wikipedia
Newberry Volcano — Paulina Peak Newberry Caldera, with Paulina Lake, East Lake, and Big Obsidian Flow Elevation … Wikipedia
Hatepe eruption — The Hatepe eruption (named for the Hatepe Plinian pumice fall deposit [cite journal |last=Talbot |first=J. P. |authorlink= |coauthors=Self, S.; Wilson, C. J. N. |year=1994 |month= |title=Dilute gravity current and rain flushed ash deposits in the … Wikipedia
Case hardening of rocks — Case hardening is a weathering phenomenon of rock surface induratoin. It is observed commonly in: felsic alkaline rocks, such as nepheline syenite, phonolite and trachyte; pyroclastic rocks, as pyroclastic flow deposit, fine air fall deposits and … Wikipedia
