Tonalite

Tonalite is an igneous, plutonic (intrusive) rock, of felsic composition, with phaneritic texture. Feldspar is present as plagioclase (typically oligoclase or andesine) with 10% or less alkali feldspar. Quartz is present as more than 20% of the rock. Amphiboles and pyroxenes are common accessory minerals. In older references tonalite is sometimes ...
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Tonalite

A coarse grained granitic rock composed of quartz, sodium-calcium feldspar and a high proportion of iron-rich minerals.
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Tonalite

Tonalite is a group of rocks consisting chiefly of quartz, orthoclase, plagioclase, hornblende and biotite. Apatite, magnetite, zircon, iron oxides etc are also often present in the rocks of the group. Tonalite resembles dark granite in its general appearance, and is so called from its occurrence at Monte Adamello, near Tonale in the eastern Alps. ...
Found on http://www.probertencyclopaedia.com/browse/HT.HTM
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