cap rock
Americannoun
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a mass of anhydrite, gypsum, or limestone immediately above the salt of a salt dome.
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an impervious stratum overlying an oil- or gas-bearing structure.
noun
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a layer of rock that overlies a salt dome and consists of limestone, gypsum, etc
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a layer of relatively impervious rock overlying an oil- or gas-bearing rock
Etymology
Origin of cap rock
An Americanism dating back to 1865–70
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
An almost kilometre thick layer of clay or cap rock will lock away the CO2, just as it trapped oil and gas for millions of years, Schovsbo explains.
From BBC
By 5:30 p.m., our class of five was gathered in the Cap Rock parking lot — one of the lots that stays open at night for stargazers.
From Los Angeles Times
After a reminder to bring water and a rundown of Cap Rock Trail, which is a 0.4-mile loop with a bathroom near the parking lot, Norris led us onto the trail to start planning our shots.
From Los Angeles Times
Hiking a social trail behind Joshua Tree National Park’s famed Cap Rock, I came across a peculiar sight that, if you know what you’re looking for, actually isn’t so unusual at all: a crude cross made of dark stones below a scribble of orange graffiti.
From Los Angeles Times
According to Kaufman and several rangers, the body was cremated on a median bordering the Cap Rock parking lot.
From Los Angeles Times
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
