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What is the difference of the three rock types besides the way they are formed?
Wiki User
∙ 12y ago
From a purely textural point of view they are as follows:
Sedimentary: grains of similar or differing sizes showing variable sphericity and roundness either grain or matrix supported.
Igneous: crystalline grains interlocking but not showing any preferred orientation.
Metamorphic: crystalline grains (for the most part except low grade metamorphic rocks) interlocking, most often showing preferred orientation (alignment) and which may contain associated metamorphic minerals such as garnet, kyanite and sillimanite for example.
Wiki User
∙ 12y ago
Wiki User
∙ 14y agoIgneous - made when magma, a hot liquid made of melted minerals cools.
Sedimentary - formed when sediments, pieces of rocks broken off by weathering and erosion, are compacted together.
Metamorphic - formed when rock is transformed by heat and pressure
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