- microgabbro
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● microgabbro nom masculin Roche microgrenue à composition de gabbro.
Encyclopédie Universelle. 2012.
microgabbro
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Gabbro — (pronEng|ˈɡæbrəʊ) is a dark, coarse grained, intrusive igneous rock chemically equivalent to basalt. It is a plutonic rock, formed when molten magma is trapped beneath the Earth s surface and cools into a crystalline mass. The vast majority of… … Wikipedia
