Quote:
Originally Posted by LouisVanDerWright
This is absolutely granite. Just because it has swirls doesn't make it marble. Marble is not pixelated like this. All the little flecks scream granite. Igneous rock all the way, this is not metamorphic rock.
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It's not marble, that's for sure. The swirls mean it's metamorphic and not igneous, as they indicate partial melting under immense temperature and pressure. It's not granite, if actually refer to it more as a gneiss, though I'd need to take a mich closer look at it to be certain of its mineralogy.
Marble is metamorphosed limestone, gneiss is metamorphosed felsic (continental) rock of granitic origin.
This has been Glowrock's geology lesson for the day.
Aaron (Glowrock)