Domed metamorphic core complexes analogous to oceanic megamullions can develop in continental extensional regimes. In southern California, the gently dipping Whipple detachment fault separates a footwall core complex (gray, highly deformed mid-crustal mylonites and chloritized breccias) from the overlying hanging wall (dark brown, Miocene volcanics). In the foreground, Eric Frost of San Diego State University outlines the tectonic framework to members of the JOIDES (Ocean Drilling Project) Tectonics Panel.[back]
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