| 释义 |
cap rock
cap rockn1. (Geological Science) a layer of rock that overlies a salt dome and consists of limestone, gypsum, etc2. (Geological Science) a layer of relatively impervious rock overlying an oil- or gas-bearing rockcap′ rock` or cap′rock`,
n. a mass of anhydrite, gypsum, or limestone immediately above the salt of a salt dome. [1865–70, Amer.] Translationscap rock
cap rock[′kap ‚räk] (geology) An overlying, generally impervious layer or stratum of rock that overlies an oil- or gas-bearing rock. Barren vein matter, or a pinch in a vein, supposed to overlie ore. A hard layer of rock, usually sandstone, a short distance above a coal seam. An impervious body of anhydrite and gypsum in a salt dome. |