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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New Locality Added: Sheppard occurrence, Barrie Township, Frontenac Co., Ontario, CanadaFrom Reiner Mielke, 23rd Oct 2014 00:47:15