Oilfield Glossary
Oilfield Glossary
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sinistral

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1. adj. [Geology]
Pertaining to a strike-slip or left-lateral fault in which the block across the fault moves to the left; also called a sinistral strike-slip fault. If it moves to the right, the relative motion is described as dextral. Counterclockwise rotation or spiraling is also described as sinistral.
Antonyms: dextral