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Inner Zone
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Inner Zone

geographical region, Japan
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Quick Summary

The "Inner Zone" refers to a geographical region within Japan, specifically part of the Southwestern Region of Japan proper. This zone is characterized by complex faulting and is primarily composed of ancient granites, Paleozoic rocks, and more recent volcanic rocks arranged in a complicated pattern. It is distinct from the Outer Zone, which has a more regular arrangement of geological formations. The Inner Zone, centered on the Chūgoku Range, features a complex mosaic of fault blocks. This geological complexity is a result of intense faulting and warping of the Earth's crust.1

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2 Britannica Sources
  1. Japan - Traditional regions
  2. Japan - The major physiographic regions

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