metamorphic rock reservoir

metamorphic rock reservoir

[¦med·ə¦mȯr·fik ¦räk ′rez·əv‚wär]
(geology)
Uncommon type of formation for oil reservoir; developed when secondary porosity results from fracturing or weathering.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.