This has been determined by shelly marine fossils, and a tonalite intrusion southwest of Red Hill with age determined as 417? Mya.
22.
The tonalite-trondhjemite-granodiorite ( TTG ) domes are shown in orange, with green mafic and ultramafic layers wrapped around them
23.
However the current IUGS classification defines tonalite as having greater than 20 % quartz, while quartz diorite varies its quartz content from 5 to 20 %.
24.
The Pebble deposit is hosted in porphyritic granodiorite to tonalite of Upper Cretaceous age intruded into deformed sedimentary rocks of the Jurassic to Cretaceous Kahiltna flysch terrane.
25.
Trondhjemite is an orthoclase-deficient variety of tonalite with minor biotite as the only mafic mineral, named after Norway's third largest city, Trondheim.
26.
These include the Amitsoq Tonalite-Trondhjemite-Granodiorite ( TTG ) orthogneisses, pillow lavas and pillow breccias, banded iron formations, granodiorites, and metasedimentary rocks.
27.
The intrusive group is related to the tonalite-trondhjemite-granodiorite TTG-suite Stolzburg Pluton, which intruded along the southern margin of the Barberton greenstone belt.
28.
Trondhjemite is common in Archean terranes occurring in conjunction with tonalite and granodiorite as the " TTG " ( tonalite-trondhjemite-granodiorite ) orthogneiss suite.
29.
Trondhjemite is common in Archean terranes occurring in conjunction with tonalite and granodiorite as the " TTG " ( tonalite-trondhjemite-granodiorite ) orthogneiss suite.
30.
At high degrees of partial melting of the crust, granitoids such as tonalite, granodiorite and monzonite can be produced, but other mechanisms are typically important in producing them.
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