(redirected from colluvial)
Also found in: Dictionary.


Loose, incoherent deposits at the foot of a slope or cliff, brought there principally by gravity.



fragmental material accumulating on mountain slopes or at the foot of slopes owing to displacement from higher areas by gravity (talus, creep, and slides) or the movement of thawing, water-saturated products of weathering in areas of permafrost.

References in periodicals archive ?
5 of adaxial crests (mm) Habitat high interfluvial area of colluvial areas and sources, deposits, with sandy among native soils and stony grassland in clayed and moist soil Geographical Santana do center-west Rio distribution Livramento, southern Grande do Sul State, Rio Grande do Sul Brazil State, Brazil, and Artigas and Rivera Departments, northern Uruguay Character/Species C.
The Serenli series is located at the coordinates 293740 4193875 (UTM 36 N) and formed on colluvial fan.
At a later time, the gradual accumulation of colluvial deposits of rock and debris from silted-up land filled up the cove with limestone and clay.
The stratigraphy of the site consists of three main stratigraphic units: the fallen rocks of the main shelter, lateral colluvial infilling deposits and anthropic sediments (See above Chapter 2.
The sedimentary cover in the area of Rajov is mostly of Quaternary age and is of fluvial and colluvial origin with many localities hosting peat.
As typical composition of mollisols is colluvial and residual material from inter bedded shales sandstones and slates.
Erosion and colluvial movement of sediments are characteristic geomorphological processes of highland areas, and they mitigate against the long-term survival of surface archaeological sites (Kamminga 1992:119; Witter 1984).
Detailed metallurgical test work in support of the resource definition work has been previously reported to the ASX for each of the Colluvial Hematite, Friable Hematite and Hard Hematite material types (refer ASX announcement 4 February 2013, 26 April 2012 and 16 October 2012 for details) as well as Davis Tube Recovery ("DTR") results for the Magnetite material (refer ASX announcement 24 April 2012 for details).
This showed primarily a variable amount of silt, sand and gravel, which may have been deposited by a combination of geomorphological processes including aeolian, fluvial or colluvial desert processes.
The favorable unit here is the dacite, same as the favorable dacite unit at Shifflett, and colluvial soil (slope wash) derived from dacite.