Ignimbrite is a type of volcanic rock, consisting of hardened tuff. [1] Ignimbrites form from the deposits of pyroclastic flows , which are a hot suspension of particles and gases flowing rapidly from a volcano , driven by being denser than the surrounding atmosphere.

2023年9月4日 · Ignimbrite is a pyroclastic igneous rock that is an expansion of hardened tuff. It is made up by crystal and rock fragments in a glass-shard groundmass, althouugh the original texture of the groundmass is probably obliterated due to high degrees of welding.

2023年12月4日 · An ignimbrite or ash-flow tuff is a type of volcanic rock formed from pyroclastic flow deposits. It has poorly sorted pumice fragments, scattered lithic fragments, and other volcanic debris in a volcanic ash matrix.

2024年9月4日 · A quick search in a text analysis tool reveals that ignimbrite has actually always held an edge over ash-flow tuff (or its variations), being several orders of magnitude more popular in books written since the 1930s. Both terms are correct - it's just a matter of preference!

An ignimbrite is a welded pyroclastic rock that contains abundant flattened juvenile clasts often originally pumice. The flattened clasts within ignimbrites are termed fiamme and range from lapilli-sized (>2 mm) to block-sized (>64 mm).

2013年4月1日 · The southern Great Basin ignimbrite province shown in Figure 2 comprises a swath of mostly mountain-range exposures of silicic ignimbrite and lesser rhyolitic to andesitic lava extending through the Sierra Nevada and eastward …

Ignimbrite is a pumice-dominated pyroclastic flow deposit formed from the cooling of pyroclastic material ejected from an explosive volcanic eruption. As the pyroclastic material settles it can build up thick layers, and if the temperature is sufficiently high (> 535°C) it can weld into rock.

2025年3月23日 · What is Ignimbrite? Ignimbrite is a type of volcanic rock formed from the deposition of extremely hot volcanic ash, pumice, and other fragments during explosive eruptions. These materials are ejected into the atmosphere and then settle back to Earth, creating a dense, welded rock layer. Why is Ignimbrite important?

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 current. Ignimbrite is synonymous with flood tuff, welded tuff, ash-flow tuff and pyroclastic flow deposit 1.

Ignimbrite is a rock formed by deposition from pyroclastic flows in a hot, swiftly moving, turbulent gaseous mixture of pumice, ash, and other fragments erupted from a volcanic event. The term ignimbrite is derived from "fiery rock dust cloud" (from the Latin igni- (fire) and imbri- (rain).