ignimbrite


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ig·nim·brite

 (ĭg′nĭm-brīt′)
n.
A volcanic rock formed by the deposition and consolidation of ash flows and nuées ardentes.

[Latin ignis, fire + imber, imbr-, rain + -ite.]

ignimbrite

(ˈɪɡnɪmˌbraɪt)
n
(Geological Science) a rock formed by the deposition at high temperature and the consolidation of a nuée ardente or other type of ash flow, being a complicated mixture of volcanic materials welded together by heat, hot gases, and pressure. Also called: welded tuft See tuft
[C20: from Latin ign(is) fire + imbr(is), imber shower of rain + -ite1]
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At the sharp interface between the coarse Taupo Ignimbrite material (~30% gravels and 23% silt) and the silty Palaeosols (1% gravels and 30% silt), there is a two-fold reduction in the unsaturated hydraulic conductivity (Barkle et al.
After this succession,there is ignimbrite tuffs which are products of submarine volcanoes after Middle Eocene.
The sequence continues with an Eocene-Oligocene unit composed of conglomerates, sandstones, multicolor tuffs, andesites, breccia and ignimbrite that rests unconformably on the Permo-Lower Triassic volcanic complex and is intruded by Miocene intrusive rocks of varied composition (granodioritic, andesitic, dacitic, dioritic, and granitic).
These volcanics are a group that includes different volcanic materials such as Incesu ignimbrite and Seksenverentepe volcanite.
Typically this style of mineralization occurs in clusters and additional mineralization is likely to be hosted in basin sediments which broadly trend south west from the mine area, and beneath a covering blanket of ignimbrite rock.
ySTANBUL (CyHAN)- "If it wasn't for ignimbrite, the history and peoples of Cappadocia would be quite different.
Direct field observations supplemented by previous studies, led to describe (1) massive ignimbrite facies lying on slightly folded Pan-African basement and (2) Ypresian alkali basalts overlain by (3) Late Oligocene/Early Miocene trachy-rhyolitic suite (Tchoua 1974; Regnoult & Deruelle, 1983; Moreau et al.
Researchers studied the remnants of ash from the Campanian Ignimbrite eruption about 40 000 years ago in sites in Greece, the Aegean Sea, Libya, and four central European caves.
The stone dolls in this area are a natural phenomenon created through centuries of erosion of volcanic rocks of different erodibility: ignimbrite, andesite and tuffs.
Consider the little-known Campanian Ignimbrite eruption, which devastated southern Italy some 39,000 years ago just as Europeans were developing stone tools.
Cappadocia region is largely underlain by sedimentary rocks formed in lakes and streams, and ignimbrite deposits erupted from ancient volcanoes approximately 9 to 3 million years ago, during the late Miocene to Pliocene epochs.
Topics include a new geological map of Stromboli volcano in Italy's Tyrrhenian Sea based on application of a lithostratigraphic and unconformity-bounded stratigraphic (UBS) units, a revised volcanostratigraphy of the Upper Miocene to Lower Pliocene Urgup formation in the central Anatolian volcanic province of Turkey, ignimbrite stratigraphy and chronology on Tercerira Island in the Azores, geologic mapping of Mexico's Colima volcanic complex and implications for hazard assessment, and probabilistic digital hazard maps for avalanches and massive pyroclastic flow using TITAN2D computational model.