Differentiate the composition and texture of a plutonic igneous rock and a volcanic igneous rock.?

Answer 1

Igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.
The composition depends on the source magma. There are almost a thousand types of composition found till now.
The space here is far less to describe all that in a precise small paragraph.
Please visit some related web site or read a book on Igneous rocks.
Spend some time with the knowledge. If you want to know something, go for it. Go to your school/College/University library; do not ask the people!
Come on man! you can do it.
Remember there is "no short cut to experience or knowledge".

Answer 2

If we assume same compositions for the plutonic rock and the volcanic rock, the universal distinction would be grain length. That the scale to which the crystals have grown. In plutonic rocks, which cool devoid of having ever been erupted, the crystals would be extra suitable for the main area. The plutonic rocks cool at a slower value, giving the crystals longer to improve in the past the magma is powerful. We call this texture phaneritic (direction-grained). For volcanic rocks, that have been erupted, the crystals would be for the main area plenty smaller on account that that magma (now lava with the aid of fact it erupted) cooled plenty speedier. We call this texture aphanitic (effective-grained). If the lava cools speedy adequate you are able to no longer be waiting to work out any crystals in any respect and it sounds as though glassy, or vitreous. Rocks that cool for a whilst, then are erupted will in many situations prepare 2 distinctive crystal length - the two super crystals from the initially sluggish cooling and small from the eruption. That texture is termed porphyritic. A crude thank you to tell apart composition is according to coloration. The lighter colored rocks will often have a stronger silica content fabric while the darker rocks often have a stronger concentration of magnesium and iron-bearing minerals. you are able to call the rocks labeled via coloration melanocratic (darkish; after melanin, the darkish pigment on your pores and skin) to leucocratic (mild colored). i'm hoping this facilitates. solid success.

Answer 3

They could have the same composition, but slower cooling in the pluton, which is surrounded by warmer rock than the volcanic material, which is surrounded by cooler air and surface rock, would lead to bigger crystals.