A metamorphic rock formation created from materials scraped off the top of a downward moving tectonic plate in a subduction zone. Mélanges occur where plates of oceanic crust subduct beneath plates of continental crust, as along the western coast of South America. They consist of intensely deformed marine sediments and ocean-floor basalts and are characterized by the lack of regular strata, the inclusion of fragments and blocks of various rock types, and the presence of minerals that form only under high pressure and low temperature conditions.
(geology) A metamorphic rock formation created from sediments and rocks scraped off the top of a downward-moving tectonic plate in a subduction zone.
A mixture or medley.
Alternative form of melange.
Origin of melange
- French from Old French meslance from mesler to mix meddle
From American Heritage Dictionary of the English Language, 5th Edition
- From French mÃ©lange, from Middle French mÃ©lange, meslange, from Old French meslance, meslinges (“set of diverse elements"), derived from mescler (“to mingle, mix up") (modern French mÃªler), from Vulgar Latin *misculÄre, from Latin misceÅ (“mix") + -inges, a suffix from Frankish *-ingo (“-ing"). More at mix, -ing.