Definition of morb
An abbreviation for Mid Ocean Ridge Basalt. Said of basalts that form by 15 to 30 percent partial melting of the upper mantle at depths of 50 to 80 kilometers below the mid ocean spreading ridges.
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Locality Updated: Macibini meteorite, Uthungulu District, KwaZulu-Natal Province, South AfricaFrom Lon Clay Hill, 14th Sep 2014 23:37:36