accretionary prism

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Figure 25: Cross section of a convergent plate boundary involving a collision between two continental plates near a Himalaya-type mountain chain.

accretionary prism

oceanic ridge

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deep-sea trench
Structure
…plate and is termed an accretionary prism. A line of explosive volcanoes, extruding (erupting) a lava that forms the volcanic rock andesite, is found on the overriding plate usually 100 km (about 60 miles) or so from the trench. In marginal trenches these volcanoes form mountain chains, such as the…
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…plate and is termed an accretionary prism. A line of explosive volcanoes, extruding (erupting) a lava that forms the volcanic rock andesite, is found on the overriding plate usually 100 km (about 60 miles) or so from the trench. In marginal trenches these volcanoes form mountain chains, such as the…
Read More