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.
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.
Examination of data, acquired from soils overlying thick piedmont gravels above known deposits, provided the opportunity to evaluate the geochemical processes occurring within, and below, cover sequences.
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