How is an island formed by a volcano?

Answer 1

when a volcano is active, over its life time (thousands of years longer than ours) it 'erupts' or 'oozes' magma/lava onto the top crustal layer of the earth, every time this happens over those thousands of years, it gets a little bit higher as more and more material builds up from the previous times the material was deposited from lava flows and violent euptions and ash clouds. You can 'go back in time' in a way by going to Hawaii islands or white island -New Zealand (one of the youngest and most active volcanic regions of earth) and see this process take place for a fraction of a second (which is the scale of how much of the entire process you would see if the process lasted for a few hours!)

Answer 2

As a volcano erupts, the rock it produces will pile up to form a mountain. If the volcano starts erupting underwater, the resulting mountain, called a seamount. can eventually be built up above the surface of the water for form a new island.

Answer 3

A lot of material comes out volcanoes, some of which start under the sea, but over time enough material is ejected for the for the material build up to reach the surface. These volcanic islands continue to grow as long as the volcano OS active.

Answer 4

An island formed by a volcano is typically created through volcanic activity that results in the eruption of lava and other materials, building up over time to form land above sea level. As lava cools and solidifies, it builds layers of rock that eventually create an island. Over time, erosion and other geological processes can further shape the island's landscape.

Answer 5

Volcanic activity over hot spots on the ocean floor form islands. Magma rising from hot spots congeal from basaltic lava flows forming Shield Volcanoes which over time grow into islands.