Intrusive igneous rock.
The features that form as a result of magma of magma hardening beneath the earth's surface are volcanic necks,sills and batholiths.
When magma cools slowly deep underground it produces a rock with larger crystals than when the magma (or lava) cools quickly near (or on) the surface.Rocks with the largest crystal structure are described as 'pegmatitic'.Rocks with crystals visible to the naked eye are described as 'phaneritic'.Rocks with no apparent crystal structure are called 'aphanitic'
Rhyolite cools faster from magma (lava) than does granite, which forms from slow cooling of magma deep underground. Granite.
Intrusive igneous rock is formed underground by the slow cooling of magma. With the insulating and heat retention effects of an underground environment, ions are free to move about the fluid magma and join onto growing mineral crystals. In a quick cooling environment, crystallization occurs rapidly, with little time for crystal growth.
Rocks formed from magma are igneous rocks. Extrusive igneous rocks form from lava at or near the surface. Intrusive rocks form from magma below the surface.
Generally, the volcano is not the result of cooling and hardening deep underground. It is the molten magma in the core of the earth that, when it rises and breaks through the earth's crust, results in volcanic action.
The cooling and hardening of magma deep underground results in igneous rock. Rare gems and diamonds can be found in igneous rock.
Magma is molten rock. It becomes rock by cooling and hardening.
The features that form as a result of magma of magma hardening beneath the earth's surface are volcanic necks,sills and batholiths.
The features that form as a result of magma of magma hardening beneath the earth's surface are volcanic necks,sills and batholiths.
Plutons
Harding of rock formations through magma flow.
Diorite is formed by the cooling of intermediate magmas underground.
The features that form as a result of magma of magma hardening beneath the earth's surface are volcanic necks,sills and batholiths.
A pluton is a body of rock formed from the cooling of magma under the surface.
The cooling, solidification, crystallization and hardening of molten magma or lava.
Igneous rocks are formed by the cooling and hardening of molten material called magma.