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The word lava comes from Italian and is probably derived from the Latin word labes, which means a fall or slide. [2] [3] An early use of the word in connection with extrusion of magma from below the surface is found in a short account of the 1737 eruption of Vesuvius, written by Francesco Serao, who described "a flow of fiery lava" as an analogy to the flow of water and mud down the flanks of ...
Pyroclastic flows sweep down the flanks of Mayon Volcano, Philippines, in 2018. A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) [1] is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of 100 km/h (30 m/s; 60 mph) but is capable of reaching speeds up to ...
The volcanic field consists of two lava flows, the Broken Back flow and the Carrizozo lava flow (Carrizozo Malpais), the second youngest in New Mexico. [5] Both lava flows originated from groups of cinder cones. The Broken Back flow is approximately 16 kilometres (10 mi) long and the Carrizozo, one of the largest in the world, is 68 kilometres ...
The earliest known lava in this cycle is the Wapiti Lake flow of the Mount Jackson group, dated at 1.2187 ± 0.0158 million years, [69] exposed near the Grand Canyon of the Yellowstone and likely vented near Wapiti Lake. [70] Another flow, the Moose Creek Butte flow (1.1462 ± 0.0022 million years), also belongs to the Mount Jackson group. [71]
Kīlauea's eruption from January 3, 1983, to 2018 was by far its longest-duration period of activity in modern times, as well as one of the longest-duration eruptions documented on Earth; as of January 2011, the eruption had produced 3.5 km 3 (1 cu mi) of lava and resurfaced 123.2 km 2 (48 sq mi) of land.
Some time during a 10–15 million-year period, lava flow after lava flow poured out of multiple dikes which trace along an old fault line running from south-eastern Oregon through to western British Columbia. [citation needed] The many layers of lava eventually reached a thickness of more than 1.8 km (5,900 ft). As the molten rock came to the ...
This is the fifth eruption that we've had in the summit area of Kilauea since December of 2020," he said, adding that lava flows have already covered a 400-acre lava lake that began in 2020.
The magma forming this lava is often felsic, having high to intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less viscous mafic magma. [4] Extensive felsic lava flows are uncommon, but can travel as far as 8 km (5 mi). [5]