Oilfield Glossary
Oilfield Glossary
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blind zone

1. n. [Geophysics]
A layer or body of rock that cannot be detected by seismic refraction, typically because its velocity is lower than that of the overlying rocks; also known as a hidden layer.
See: refraction
2. n. [Geophysics]
A shadow zone, or a zone through which waves do not pass, or cannot be recorded, or in which reflections do not occur.