ES2 Metamorphic Rocks - Metamorphic Microstructures #20
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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DJW - August 1997