piedmont gravel

piedmont gravel

[′pēd‚mänt ¦grav·əl]
(geology)
Coarse gravel derived from high ground by mountain torrents and spread out on relatively flat ground where the velocity of the water is decreased.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Research was initiated in 1998 on geochemical methods of exploration for copper porphyry deposits buried under thick, lithified piedmont gravel cover in the Atacama Desert, Chile.
From the late Oligocene through the middle Miocene, a large volume of sediment sourced from the Precordillera was deposited in the Central Depression, obscuring much of the basement; most prominent of these Tertiary sediments are early to middle Miocene piedmont gravels. The Precordillera consists of Triassic to Eocene fault-bounded blocks.
The deposit forms a basement hill covered by piedmont gravels, which vary in thickness from 30 m to 150 m.
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