Differentiate between plutonic rocks and volcanic rocks.

Differentiate between plutonic rocks and volcanic rocks

Here’s a comparison between plutonic rocks and volcanic rocks in tabular form:

CategoryPlutonic RocksVolcanic Rocks
FormationFormed through slow cooling and solidification of magma deep within the Earth’s crust.Formed through rapid cooling and solidification of lava on or near the Earth’s surface.
Cooling RateSlow cooling allows for the formation of large mineral crystals.Rapid cooling prevents the formation of large mineral crystals, resulting in fine-grained or glassy textures.
TextureCoarse-grained texture with visible mineral grains.Fine-grained to glassy texture with microscopic mineral grains.
ColorVaried colors, including light to dark shades, depending on the mineral composition.Dark-colored rocks, such as basalt, due to the presence of iron and magnesium-rich minerals.
Mineral CompositionCommon minerals include quartz, feldspar, mica, and amphibole.Common minerals include basaltic minerals like pyroxene, olivine, and plagioclase feldspar.
IntrusionIntrusive igneous rocks that intrude into the surrounding rocks.Extrusive igneous rocks that extrude onto or above the Earth’s surface.
ExamplesGranite, diorite, gabbro.Basalt, andesite, rhyolite.

It’s important to note that plutonic rocks and volcanic rocks are both types of igneous rocks. The main difference lies in their formation and cooling rates, which result in distinct textures, mineral compositions, and appearances.


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