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Why are extrusive rocks sometimes referred to as volcanic?
An extrusive rock is a rock that has been deposited at the earths surface as a liquid/fluid, coming to the surface form a depth through a fissure in the earth as a liquid/fluid. The most common type of liquid rock is a magma and magmas erupting at the surface are called "volcanoes" and thus the rocks are called "volcanic" rocks. However there are also volcanoes to be found that have nothing to do with molten rock magmas. These are called "Mud" volcanoes and they are caused by de-watering processes in rocks. The muds brought to the surface are also technically extrusive and these are NOT volcanic rocks.
What is the major process of surface rock formation on volcanoes?
The major process of surface rock formation on volcanoes is volcanic eruptions. When molten rock (magma) from the Earth's mantle reaches the surface, it solidifies to form igneous rocks like basalt or rhyolite. Over time, repeated eruptions build up layers of volcanic rocks that contribute to the formation of the volcano.
What type of rock do volcanoes have?
Volcanoes are typically associated with igneous rocks, which are formed from the solidification of magma or lava. Igneous rocks such as basalt and andesite are commonly found in and around volcanic areas.
What are hot spot volcanoes called?
Hot spot volcanoes are called mantle plumes. These volcanic features occur when molten rock rises from deep within the Earth's mantle, creating localized volcanic activity on the surface. Examples include the Hawaiian Islands and Yellowstone National Park.
What are the rocks that come out of volcanoes called?
The rocks that come out of volcanoes are called volcanic rocks. These rocks are formed from lava that has cooled and solidified either within the volcano or on the Earth's surface. Examples include basalt, andesite, and rhyolite.
Why would you find a volcanic rock on a volcanic island?
Volcanic islands are formed by volcanoes and are therefore composed of volcanic rock.
What rock is created by volcanoes and volcanic action?
There are many kinds of volcanic rock. http://en.wikipedia.org/wiki/Volcanic_rock
Does pumice come from volcanoes?
Yes. Pumice is a volcanic rock.
Why is granite found in Singapore when there are no volcanoes?
Granite is an igneous rock. It is not considered a volcanic rock, but a plutonic rock.
What are rocks produced from lava and ash in volcanoes called?
volcanic rock
Do elephants eat lumps of volcanic rock?
Certain species of elephants have been known to climb to volcanoes and consume lumps of volcanic rock. This volcanic rock is rich in sodium, important for the elephants diet.
Are all islands made from volcaneos?
not all are made of volcanic rock but those that are close to active volcanoes will most prob be built of volcanic rock :-)
How were the Hawaiian Islands built?
by undersea volcanoes by dried up volcanic rock
Is AAA a form of volcanic rock?
AAA is nothing in relation to volcanoes. A'a is a variety of volcanic rock, formed from a basaltic lava flow with a jagged surface.
Are Trinidad and Tobago volcanic islands?
Tobago is volcanic in origin, but there are no volcanoes on Trinidad or Tobago.Tobago is volcanic in origin, but there are no volcanoes on Trinidad or Tobago.Tobago is volcanic in origin, but there are no volcanoes on Trinidad or Tobago.Tobago is volcanic in origin, but there are no volcanoes on Trinidad or Tobago.Tobago is volcanic in origin, but there are no volcanoes on Trinidad or Tobago.Tobago is volcanic in origin, but there are no volcanoes on Trinidad or Tobago.Tobago is volcanic in origin, but there are no volcanoes on Trinidad or Tobago.Tobago is volcanic in origin, but there are no volcanoes on Trinidad or Tobago.Tobago is volcanic in origin, but there are no volcanoes on Trinidad or Tobago.Tobago is volcanic in origin, but there are no volcanoes on Trinidad or Tobago.Tobago is volcanic in origin, but there are no volcanoes on Trinidad or Tobago.
Have any volcanoes ever existed in virginia?
Virgina did have volcanoes in the ancient times. Scientists have found traces of volcanic rock in the ground.
What type of volcanic rock do you find in a explosive volcano?
Explosive volcanoes can produce pumice and tuff.
