An account to igneous rocks
Basalt: Ocenic crust is mainly formed of this igneous and rock. This highly erosion resistant, hard, heavy rock white, may be grey to black in colour. Chief constituent ite is minerals of basalt are feldspar, olivine and pyroxene. very This rock is highly permeable as there are many joints -oled and cracks present in this rock. As magma cools and meter solidifies rapidly basalt is fine granied (diameter is < s of 1mm). Flat topped landforms are formd in regions composed of basalt rock.
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