cap rock


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Related to cap rock: reservoir rock, source rock

cap rock

n
1. (Geological Science) a layer of rock that overlies a salt dome and consists of limestone, gypsum, etc
2. (Geological Science) a layer of relatively impervious rock overlying an oil- or gas-bearing rock
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

cap′ rock`

or cap′rock`,


n.
a mass of anhydrite, gypsum, or limestone immediately above the salt of a salt dome.
[1865–70, Amer.]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Translations

cap rock

n (Geol) → roccia di copertura
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995
References in periodicals archive ?
Mount Sodom is essentially a huge salt block covered by a thin but resilient layer of cap rock.
The Ghazij Shales act as cap for SML and SUL while Sirki Shales over HRL act as a cap rock.The present study focused on the formation evaluation and integrating it with petrophysics based on well log data in Eocene reservoirs in Qadirpur area.
It produces 32-34[degrees] API oil from an Asmari Fm, partly equivalent to Iran's Asmari and lying below a Miocene Lower Fars cap rock. Additional production is possible from the Upper Cretaceous Shiranish Fm (27[degrees] API) and the Mid-Cretaceous Qamchuqa Fm.
I didn't know if this would set off bells and whistles, but to my surprise, the ranger told me about Cap Rock. I found the site and left Gram an offering.
Posting on their page, the group said: "Apparently, a wet spring lubricated across a cap rock. Then, a small spring on either side caused the bottom to slide out.
Another major factor, highlighted in a recent PUC report, was Sharyland's 2010 acquisition of Cap Rock Energy, an electric cooperative that later became regulated.
This requires a "cap rock," or an impervious rock layer that becomes a seal over the reservoir.