Structure of the Earth Tectonics. Chapter 22 ISCI 2001. Structure of the Earth. Crust. (1). Thin, brittle Oceanic Basalt rock (dark); greater density Continental Granitic rock (lighter); less dense Less dense than mantle Floats. Mantle. (1). Most of the volume (82%) and mass (65%)
Structure of the EarthTectonics
The convergence of the Nazca and SouthAmericanPlates has deformed and pushed up limestone strata to form the towering peaks of the Andes, as seen here in the Pachapaqui mining area in Peru.
Conjugate Normal faults, Canyonlands National Park, Utah
Folded Mountain – Antarctica
Adirondack Mountains – unwarped
80% of all interplate EQs occur here
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