Common examples include schist, gneiss, and marble, which often display foliation or banding—a direct result of the pressure applied during their formation. You might find them forming the bulk of oceanic crust or volcanic mountains.
Metamorphic Features: How Pressure and Heat Transform Rocks
Think of this as a geological renovation; the original rock is altered physically and often chemically, recrystallizing into new minerals and textures. These two rock types represent opposite ends of the thermal spectrum: one born from cooling fire, the other forged under intense pressure and heat.
Transformation Under Pressure: The Metamorphic Process While igneous rocks are created, metamorphic rocks are transformed. Conversely, if the magma erupts onto the surface as lava and cools rapidly, it forms extrusive rocks like basalt, which typically exhibit a fine-grained or glassy texture.
Metamorphic Features: Foliation, Formation, and Transformation
A rock like gneiss might display alternating bands of light and dark minerals, a clear indicator of its metamorphic past that an igneous rock would not possess. This process, known as metamorphism, means "change in form," and it occurs without the rock fully melting.
More About Difference between igneous and metamorphic rocks
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More perspective on Difference between igneous and metamorphic rocks can make the topic easier to follow by connecting earlier points with a few simple takeaways.
