ES2 Metamorphic Rocks - Metamorphic Microstructures #20
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Symplectite.
Symplectites are intimate intergrowths of two or more minerals,
generally formed by the breakdown of another mineral under conditions
of limited element mobility. Here two different symplectites of
orthopyroxene + sapphirine (left) and orthopyroxene + spinel (right)
(with some colourless cordierite) invade garnet (top).
Field of view is 1 mm across.
Ganguvarpatti, South India.
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