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A volcanic rock formed by the deposition and consolidation of ash flows and nuées ardentes.

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


(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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Binal, "Prediction of mechanical properties of non-welded and moderately welded ignimbrite using physical properties, ultrasonic pulse velocity, and point load index tests," Quarterly Journal of Engineering Geology and Hydrogeology, vol.
As the eruptive pile cools, settles and compacts, escaping heat and volatiles fuse the ejecta into a hard, compact rock known as welded ash-flow tuff or ignimbrite.
According to the conducted studies, the following volcanic rocks have been observed in this belt: basalt, basaltic andesite, andesite, trachyte, latite, trachyandesite, dacite and rhyodacite ignimbrite and acidic to intermediate tuffs.
The regional landscape and drainage system in this area is repeatedly reset by ignimbrite eruptions from the nearby Ilopango caldera.
2), is used as a reference eruption, since the distribution of ignimbrite and tephra erupted is well documented.
The Campanian Ignimbrite Eruption: New Data on Volcanic Ash Dispersal and Its Potential Impact on Human Evolution," PLOS One 8 (2013): 6; R.
After this succession,there is ignimbrite tuffs which are products of submarine volcanoes after Middle Eocene.
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.