surficial deposit

surficial deposit

[sər′fish·əl di′päz·ət]
(geology)
Unconsolidated alluvial, residual, or glacial deposits overlying bedrock or occurring on or near the surface of the earth. Also known as superficial deposit; surface deposit.
References in periodicals archive ?
It is clear that, rather than a general-purpose ground water hydrology map, the maps should show accurate depths, characteristics of the unconsolidated surficial deposits and their corresponding leaching effects.
Many small-scale landslides in flysch slopes, primarily rotational and translational slides, tend to occur along slip surfaces that are located at the contact between the surficial deposits and the flysch bedrock, within the colluvial surficial deposits (Figure 3(a)) [23], within the flysch rock mass (Figure 3(b)) [24], or as debris flows (Figure 3(c)) [21].
The rocks exposed in the coal bearing area are sedimentary rocks ranging in age from Jurassic to Pleistocene along with Subrecent and Recent surficial deposits.
During the last decade more than a dozen geologists and some pedologists and botanists have tackled the surficial deposits of western Ohio for a reinterpretation of Ice Age history.
The surficial deposits that are the subject of this study were produced from its major recent eruptions, which occurred in 1723 and 1963-1965.
It should be noted that, while maps of bedrock and surficial deposits and their structural elements are still the principal products of geological mapping and were largely the focus of the NATMAP program, they are not the only category of geological maps.
Field verification consisted of numerous north-south transects in each drainage system, in which geomorphologists described the physical landscape, examined geomorphic surfaces and surficial deposits exposed in natural outcrops such as stream banks and coastal bluffs, and completed soil profiles of exposures in wells, landfill pits, and new house excavations.
Of the 77 CPTs in study, 40 are located in af, 5 in Qht, 2 in Qhec, 7 in Qhes, 3 in Qwc, and 20 in Qws surficial deposits.
In relatively flat-lying areas, a well-developed soil profile with humus cover typically comprises the upper 1 m of most surficial deposits.
The wide range of climates has resulted in wonderfully diverse zones of supergene enrichment and an array of curious surficial deposits that include lithium-rich brines and the famous nitrates of the Atacama Desert.
Surficial deposits "cover the bedrock surface in thicknesses commonly of 150-400 feet (45.
Climatic warming, if it causes an increase in annual thaw depths or in the frequency and extent of geomorphic disturbances, could also result in active layer salinization within areas of salt-rich permafrost, such as in marine surficial deposits.