Granodiorite
A variety of Igneous
What is Granodiorite?
Granodiorite is a common, globally-distributed rock that is very similar in composition to granite. Several famous stone artifacts, including Plymouth Rock and the Rosetta Stone, are made from granodiorite. The rock has some industrial uses, being utilized as filler and in the construction of facades and pavement.
Etymology & Origins
The name comes from two related rocks to which granodiorite is an intermediate: granite and diorite. The gran- root comes from the Latin grānum for "grain", an English language derivative. Diorite is named after the contrasting colors of the rock.
Uses & Applications
Granodiorite is often used in construction, including for walls, cobblestones, and countertops. When crushed, it can also be used in road pavement. It was once a popular ornamental stone, and was used in construction since the time of the Ancient Romans.
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Granodiorite Localities Map
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Key Characteristics
Composition of Granodiorite
On average, the upper continental crust has the same composition as granodiorite. Granodiorite is a plutonic igneous rock, formed by intrusion of silica-rich magma, which cools in batholiths or stocks below the Earth's surface. It is usually only exposed at the surface after uplift and erosion have occurred.
Clasts of Granodiorite
Dacite, andesite, granodiorite, diorite, vein quartz, and silicified tuff
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Quick Facts
Physical Properties
- Color
- Light gray, light brown, red, pink, white, etc.
- Hardness (Mohs)
- 6
- Density
- 2.6 - 2.8 g/cm³
Chemical Properties
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