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Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as tuffaceous (for example, tuffaceous sandstone).
Aug 15, 2023 · Tuff rock, also simply known as “tuff,” is a type of sedimentary rock that forms from the consolidation of volcanic ash and other volcanic debris. It is a unique rock type that results from explosive volcanic eruptions, during which a mixture of hot ash, rock fragments, and gases is expelled into the atmosphere.
The meaning of TUFF is a rock composed of the finer kinds of volcanic detritus usually fused together by heat.
tuff, a relatively soft, porous rock that is usually formed by the compaction and cementation of volcanic ash or dust.
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Jun 1, 2018 · Tephra is large rock fragments of different sizes and shapes which are formed when magma is explosively ejected into the atmosphere by the expansion of volcanic gases. The fragments with a diameter less than 2mm will be deposited further from the volcano to form volcanic ash.
noun. , Geology. a fragmental rock consisting of the smaller kinds of volcanic detritus, as ash or cinder, usually more or less stratified. tuff. / tʌf; tʌˈfeɪʃəs / noun. a rock formed by the fusing together on the ground of small rock fragments (less than 2 mm across) ejected from a volcano.
ADVERTISEMENT. What is Tuff? Tuff is an igneous rock that forms from the products of an explosive volcanic eruption. In these eruptions, the volcano blasts rock, ash, magma and other materials from its vent. This ejecta travels through the air and falls back to Earth in the area surrounding the volcano.
Jan 16, 2024 · Tuff or ash tuff is a pyroclastic rock with at least 75% volcanic ash. Volcanic ash are particles no more than 2 mm ejected during a volcanic eruption. On the other hand, pyroclast rocks form from lithified or welded materials ejected during volcanic eruptions. These materials are called tephra or pyroclasts.
