Gabbro-C

Gabbro


Characteristics: -Igneous rock. -Intrusive. -Coarse.



How does it form? Gabbro forms from magma that's rich in iron and magnesium, but poor in silica. The magma cools and crystalizes inside Earth. Its magma is almost the same as basalt's and diabase's, but since it cools off slower it has larger crystals.



What does it look like? It is a dark rock with visible crystals, usually varying from dark green to black.

What minerals make gabbro up? Amphibole, plagioclase feldspar, olivine, and pyroxene.

Where is it found/formed? It is found around the world, because it forms by magma cooling deep underground.

Uses: -Gabbro usually contains good amounts of gold, silver, platinum, cobalt, etc. -It is often used as ornaments.

Sources: http://geology.about.com/od/rocks/ig/igrockindex/rocpicgabbro.htm http://geology.com/rocks/gabbro.shtml http://www.kosmix.com/topic/gabbro

Made by: -Jesrik Gomez -Jordan Bowers