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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 ...
The flows have flow fronts about 16 feet (5 m) high; [44] lobes, inflation structures and material rafted off the cone appear on the lava flows, [45] which are classified as aa lava. [46] During the eruption of Marcath, tephra was emplaced northeastward for over 3.1 miles (5 km) and is formed by lapilli and scoria; [ 44 ] another tephra deposit ...
Pahoehoe lava is smooth and ropy while Aa lava is blocky and hard. Lava flows normally follow the topography, sinking into depressions and valleys and flowing down the volcano. Lava flows will bury roads, farmlands and other forms of personal property. [1] This lava could destroy homes, cars, and lives standing in the way. [2]
Hawaii Volcanoes National Park offers the best views of the lava flow. At night, the lava's glow is "currently visible from many areas and overlooks surrounding Kaluapele (Kīlauea caldera ...
The Greenstone Flow is one of the world's largest known lava flows, estimated at a volume ~1650 to ~6000 cubic kilometers of mafic lava. [2] [3] In places, the lava pooled to depth of 487 meters. [4] The flow was generated by a flood basalt eruption during the Midcontinental Rift, which occurred 1.1 billion years ago. [5]
A'a lava moves in a peculiar way—the front of the flow steepens due to pressure from behind until it breaks off, after which the general mass behind it moves forward. Pahoehoe lava can sometimes become A'a lava due to increasing viscosity or increasing rate of shear, but A'a lava never turns into pahoehoe flow. [11]
Heavy rains and torrents of cold lava and mud flowing down a volcano's slopes on Indonesia’s Sumatra island triggered flash floods that killed at least 15 people and injured several others ...
Aa_channel_flow_from_Mauna_Loa.jpg (800 × 500 pixels, file size: 113 KB, MIME type: image/jpeg) This is a file from the Wikimedia Commons . Information from its description page there is shown below.