pyroclast


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Related to pyroclast: batholith, tephra, Pyroclastic flow

pyroclast

(ˈpaɪrəʊˌklæst)
n
(Geological Science) a piece of lava ejected from a volcano
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References in periodicals archive ?
The sugary cumulus were glowering now, erupting into the lower atmosphere like volcanic pyroclast.
The crystalline lamproitic dome of the volcano is surrounded by a ring constituted by the phreatomagmatic-effusive complex, composed by contact breccia, phreatomagmatic breccia (with pyroclast ash, lapilli and bombs, and white carbonate clasts from the host rock) and lava interlayers (massive clastogenics and banded vesiculars).
Pyroclast ranges in air on Earth can be several tens to at most a few hundred meters, and ranges would be much smaller in submarine Strombolian events on the ocean floor or on Venus because of the higher ambient pressure.
1983: Mechanisms of hydrovolcanic pyroclast formation: grain size, scanning electron micros-copy, and experimental results.
2012: Tephra architecture, pyroclast texture and magma rheology of mafic, ash-dominated eruptions: the violent strombolian phase of the Pleistocene Croscat (NE Spain) eruption.
1983: Interpretation of pyroclast surface features using SEM images.
H, 1984: Mechanisms of hydrovolcanic pyroclast formation: Grainsize, scanning electron microscopy, and experimental studies.
The pyroclastic rocks are volcaniclastic rocks formed by accumulation of pyroclasts (fragments) during Mesozoic explosive eruption by Yanshan movement.
The rock units in the area mainly include Eocene volcanic rocks (lava flows and pyroclasts belonging to the Karaj formation) and Oligocene granitoid intrusive bodies (figure 2).
Sizes and Shapes of 10-Ma Distal Fall Pyroclasts in the Ogallala Group, Nebraska.