(geology) A block of the Earth's crust, bounded by faults, that has been raised relative to the surrounding area.
1963, F. Geukens, S. D. Bowers (translator), Geology of the Arabian Peninsula: Yemen, U. S. Geological Survey Professional Paper 560-B, page B19,
Innumerable faults, in fact, cut through the country, many bounding secondary grabens and horsts.
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