Which volcano erodes very quickly

Continued erosion removes all traces of the cone and the land is worn down to a surface of low relief. All that remains is a projecting plug or "volcanic neck," a small lava-capped mesa, and vestiges of the once lofty volcano and its surrounding lava plateau. Shield volcanoes The internal structure of a typical shield volcano S hield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows.

Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield. They are built up slowly by the accretion of thousands of highly fluid lava flows called basalt lava that spread widely over great distances, and then cool as thin, gently dipping sheets.

Lavas also commonly erupt from vents along fractures rift zones that develop on the flanks of the cone. Some of the largest volcanoes in the world are shield volcanoes. In northern California and Oregon, many shield volcanoes have diameters of 3 or 4 miles and heights of 1, to 2, feet. The Hawaiian Islands are composed of linear chains of these volcanoes including Kilauea and Mauna Loa on the island of Hawaii-- two of the world's most active volcanoes.

The floor of the ocean is more than 15, feet deep at the bases of the islands. As Mauna Loa, the largest of the shield volcanoes and also the world's largest active volcano , projects 13, feet above sea level, its top is over 28, feet above the deep ocean floor. Mauna Loa Volcano, Hawaii, a giant among the active volcanoes of the world; snow-capped Mauna Kea Volcano in the distance. I n some eruptions, basaltic lava pours out quietly from long fissures instead of central vents and floods the surrounding countryside with lava flow upon lava flow, forming broad plateaus.

Lava plateaus of this type can be seen in Iceland, southeastern Washington, eastern Oregon, and southern Idaho. Along the Snake River in Idaho, and the Columbia River in Washington and Oregon, these lava flows are beautifully exposed and measure more than a mile in total thickness. Schematic representation of the internal structure of a typical volcanic dome.

V olcanic or lava domes are formed by relatively small, bulbous masses of lava too viscous to flow any great distance; consequently, on extrusion, the lava piles over and around its vent. The lifting and removal of loose material by wind is called. Does Sydney Australia have a temperate climate zone. Q: What volcano erodes very quickly? Write your answer Related questions. What kind of volcano erodes very quickly?

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This photo is courtesy of Dr. Scott Rowland of the University of Hawaii. You are looking at the inside of a volcanic crater. The steep walls were produced be many eruptions ejecting very liquid lava. This lava then lands on the crater walls building them higher and higher. The lava in the main vent is extremely hot probably about degrees F. The lava on top cools and hardens because the air that it is in contact with is so much cooler than the lava. This hardened lava will then be dragged back down under the surface and remelted.

You probably noticed the same process if you have ever heated soup on the stove. If you did not keep stirring the soup it formed a "scum" on top. The letter F represents layers of tuff and lava. When a volcano erupts it may eject lava, lava rock and ash.

When stratovolcanoes are built some of the lava and ash lands and stays on the volcano building it higher and higher with each eruption. Useful tips. Esther Fleming April 13, Table of Contents. Previous Article How native and introduced species have adapted to life in Australia? Next Article Why are books more detailed than movies? Back To Top.