quartzarenite

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• Quartzarenite — A quartzarenite is a sandstone composed of greater than 95% quartz. Quartz is a very weathering resistant mineral and accumulates into sediment as weathering and erosion proceeds. Quartzarenites are therefore often rocks that form through… …   Wikipedia

• Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… …   Wikipedia

• χαλαζαρενίτης — ο, Ν (πετρογρ.) ιζηματογενές πέτρωμα που ανήκει σε ομάδα τών ψαμμιτών και περικλείει κόκκους χαλαζία σε ποσοστό πάνω από 95%. [ΕΤΥΜΟΛ. Απόδοση στην ελλ. ξεν. όρου, πρβλ. αγγλ. quartzarenite] …   Dictionary of Greek