Granodiorite
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Granodiorite is a coarse-grained intrusive igneous rock similar to granite, but containing more plagioclase feldspar than orthoclase feldspar.
A sample of granodiorite from the Massif Central, France
Photomicrograph of thin section of granodiorite from Slovakia (in crossed polarised light)
Granodiorite near the Roses Lighthouse, Catalonia, Spain.
Orbicular granite
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Orbicular granite is an uncommon plutonic rock type which is usually granitic in composition. These rocks have a unique appearance due to orbicules - concentrically layered, spheroidal structures, pro
Outcrop of orbicular granite near Caldera, Chile.
Close-up of orbicular granite near Caldera, Chile.
Polished rock sample of orbicular granite from Mount Magnet, Western Australia