Block of Tonalite, Amphibolite, Migmatite, and Granodiorite

- Block of four different rocks;
1- Tonalite.
2- Amphibolite.
3- Migmatite.
4- Granodiorite.

- Tonalite is an igneous, plutonic, intrusive, felsic rock. With phaneritic texture. Feldspar is present as plagioclase (oligoclase or andesine). With 10% or less alkali feldspar. Quartz is present as more than 20% of the rock. The accessory minerals may be amphibole and pyroxene.

- Amphibolite is a metamorphic rock that contains amphibole, hornblende, and actinolite, as well as plagioclase. With little or no quartz. It is typically dark-colored and dense, with a schistose or flaky structure.

- Migmatite is a composite rock found in medium and high-grade metamorphic environments.

- Granodiorite is an intrusive, igneous rock, similar to granite, but containing more plagioclase feldspar than orthoclase feldspar. With a phaneritic texture.

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⁃ Taken and published by Geologist Metwally Hamza,
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