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Well When melted rock cool, they either cool fast or slowly. You have those that extruded to the surface and cool very fast usually have a fine grain igneous rocks. like the basalts and they are called extrusive igneous rocks. Those that cool with the earth as the magma rises are called intrusive igneous rocks and they have course grain. Eg are the Granite
Not quite...
In fact it's nothing to do with cooling rate and location.
Igneous rocks are those formed by crystallising from molten blends of metal-silicates.
Basalt and Granite are two very different rocks chemically and mineralogically. Their cooling and crystallising are not part of that difference.
Granite can be very fine-grained - it's called "aplite" - though it usually found in coarsely-crystalline forms (pegmatite, if I recall correctly, for very coarse versions).
The main difference between the two is the proportion of silica, with granite having the greater proportion. That makes it viscous when molten, leading to explosive eruptions as such volcanoes are also very gassy.
Further, granite is so by being a blend of 3 "essential minerals" - quartz, mica and felspar, with these occurring in a wide range of specific compounds.
Basalt is simpler, iron-rich, with relatively low silicon content which makes its lava fairly free-flowing.
Between these two main rocks is a bewilderingly complicated range controlled by essential and accessory minerals and the silica content. Igneous petrology is a speciality all of its own!
What else can I help you with?
What are two possible fates for a igneous rock?
Two of the most common fates of igneous rocks are to become sediment (and later sedimentary rocks) or to become metamorphic rocks.
How do igneous rocks can become sedimentary metamorphic and igneous rocks?
Igneous rocks can transform into sedimentary rocks through weathering and erosion, which breaks down the igneous rock into sediments that are then compacted and cemented together. Igneous rocks can also undergo metamorphism due to heat and pressure, resulting in the formation of metamorphic rocks. Igneous rocks can also melt and be recrystallized to form new igneous rocks through cooling and solidification.
How can igneos rocks become sedimentary rocks?
Igneous rocks can become sedimentary rocks through the process of weathering and erosion, which breaks down the igneous rocks into small particles. These particles are then transported and deposited, forming layers of sediment. Over time, the pressure and compaction from the overlying layers can cement the sediment particles together, creating a sedimentary rock.
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
What do you call rocks that have been formed from the hot molten material within the earth's crust that has cooled and hardened?
Igneous rocks are formed by the solidification of molten materials.
How do igneous rock become metamorphic rocks?
Metamorphic rocks become igneous rocks by melting from heat and pressure, remnants of which may cool from melt (magma) and become components of igneous rock.
What types of rocks can become igneous rocks?
All rocks can become igneous rocks. With weathering and erosion, an igneous rock can become a sediment. Then with compaction and cementation, it can become a sedimentary rock. With heat and pressure, it will turn into a metamorphic rock. Or it can melt and turn into an igneous rock. There are many more ways rocks can change types... that is the rock cycle.
What are two possible fates for a igneous rock?
Two of the most common fates of igneous rocks are to become sediment (and later sedimentary rocks) or to become metamorphic rocks.
What is required to change an igneous rock into a sedimentary rock?
Igneous rocks are a "finished product". They do not become sedimentary rock - though sedimentary rocks, with heat and pressure can become metamorphic rocks.
Do igneous rocks directly become metamorphic rock?
no
What do igneous rocks become when you break down and settle into layer?
sedimentary rocks
Are volcanic rocks sedimentary?
No. Volcanic rocks are igneous (although not all igneous rocks are volcanic). Sedimentary rocks are made of sediment naturally cemented together. However, volcanic (or extrusive igneous) rocks can be eroded into sediment, which can be cemented, compacted, or otherwise become sedimentary rock such as sandstone or conglomerate. It is then not considered igneous.
How does metamophic rocks become igneous rocks?
When metamorphic rock melts from pressure and heat, then the product of that melt solidifies, it is considered an igneous rock.
How does metamorphic rocks become an igneous rock?
they are melted together
Which type of rocks can become metamorphic?
Both sedimentary and igneous
What causes igneous rocks to become magma?
Cooling to a solid.
When molten rocks cools what rocks form?
igneous rocks
