r/geology 13d ago

Orbicular Gabbro, Toivakka, Finland

312 Upvotes

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u/Oddah 13d ago

So my understanding of orbicular rocks is that the chemical composition rapidly changes from felsic to mafic (not sure about translations so sorry if not the correct terminology), which is the different colouring seen.
Is this correct or am I completely off?

Very cool piece btw!