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Charlotte Ross——Studied at the University of Sydney, Lives in Sydney, Australia.
Gabbro is a coarse-grained and usually dark-colored igneous rock. It is an intrusive rock. It means that it formed as magma cooled slowly in the crust. Igneous rocks with similar composition are basalt (
extrusive equivalent of gabbro) and diabase (the same rock type could be named dolerite or microgabbro instead).
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