Ignimbrite

An ignimbrite is the deposit of a pyroclastic density current, or pyroclastic flow, which is a hot suspension of particles and gases flowing rapidly from a volcano. Ignimbrite is a pumice-dominated pyroclastic flow deposit formed from the cooling of pyroclastic material ejected from an explosive volcanic eruption. As the . Ignimbrites are pumice-dominated pyroclastic flow deposits with subordinate ash. There are many historic examples, most of which are restricted to valleys. Ignimbrite is a pyroclastic rock formed by very hot ground-hugging cloud of volcanic ash, blocks, and gases known as pyroclastic flow or pyroclastic density. Ignimbrites are composed of bomb- to lapilli-sized pumice fragments, and subordinate lithic fragments, embedded in a matrix of vitric, crystal, and lithic ash. An ignimbrite is the deposit of a pyroclastic density current, or pyroclastic flow, a hot suspension of particles and gases that flows rapidly from a volcano, driven. ignimbrite: Rock composed of compacted volcanic ejecta (see tuff). A co-ignimbrite ash is a cloud of fine ash particles that overrides a pyroclastic density current.The process responsible for the formation of these clouds is call. Ignimbrite definition, a fine-grained volcanic rock consisting mainly of welded shards of feldspar and quartz. See more.

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