Volcanic ash consists of fragments of rock, mineral crystals, and volcanic glass, produced during volcanic eruptions and measuring less than 2 mm (0.079 inches)...
81 KB (9,833 words) - 01:44, 13 August 2024
Tuff (redirect from Volcanic tuff)
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...
42 KB (4,848 words) - 06:48, 10 July 2024
Several types of volcanic eruptions—during which material is expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These...
75 KB (7,663 words) - 11:21, 19 July 2024
colliding, fragmenting particles of volcanic ash (and sometimes ice), which generate static electricity within the volcanic plume, leading to the name dirty...
20 KB (2,046 words) - 09:15, 9 May 2024
Plumes of volcanic ash near active volcanoes are a flight safety hazard, especially for night flights. Volcanic ash is hard and abrasive, and can quickly...
14 KB (1,647 words) - 12:54, 19 August 2024
and may also form glassy lava flows. Ash-flow tuffs typically consist of countless microscopic shards of volcanic glass. Basalt, which is low in silica...
6 KB (716 words) - 17:52, 17 July 2023
Eruption column (redirect from Volcanic ash plume)
is a cloud of super-heated ash and tephra suspended in gases emitted during an explosive volcanic eruption. The volcanic materials form a vertical column...
13 KB (1,625 words) - 07:24, 21 August 2024
is a geochronological technique that uses discrete layers of tephra—volcanic ash from a single eruption—to create a chronological framework in which paleoenvironmental...
18 KB (2,029 words) - 01:39, 13 August 2024
Pozzolana (redirect from Pozzolanic ash)
volcanic ash used by the Romans in Italy, at Pozzuoli. The modern definition of pozzolana encompasses any volcanic material (pumice or volcanic ash)...
9 KB (1,103 words) - 16:15, 15 August 2024