When a new ocean crust plates with cold contracted more than ten million years. Density, it will gradually add more until it has a density greater than the magma layer below. Then to burrow itself into the underwater world, called a Subduction. (Convergent Plate Boundaries), plate tectonics, two plates are moving into collision. Plate tectonics Ocean density rather than to smash and to burrow below ground the continent crust plates density is less than. Compression occurs and partial melting (Melting Partially) because of the high temperature and pressure. Cause of earthquake and volcano above where you have to burrow by a Mobile Convergence will cause 3 landform characteristics.
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