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n. pl. col·lu·vi·ums or col·lu·vi·a (-vē-ə)
A loose deposit of rock debris accumulated through the action of gravity at the base of a cliff or slope.

[Latin, a collection of washings, dregs, from colluere, to wash thoroughly : com-, intensive pref.; see com- + -luere, to wash; see leu(ə)- in Indo-European roots.]

col·lu′vi·al adj.


n, pl -via (-vɪə) or -viums
(Geological Science) a mixture of rock fragments from the bases of cliffs
[Latin: collection of filth, from colluere to wash thoroughly, from com- (intensive) + luere to wash]
colˈluvial adj


(kəˈlu vi əm)

n., pl. -vi•a (-vi ə) -vi•ums.
loose earth material that has accumulated at the base of a slope; talus.
[1935–40; < Latin colluv-, base of colluere to rinse, wash out <lavere to wash; compare alluvium, deluge]
col•lu′vi•al, adj.
References in periodicals archive ?
The soils on transects T1, T4, and T5 developed on rhyolitic colluvium and alluvium found on the upper piedmont slopes and have been mapped as Chilicotal soils (United States Department of Agriculture--Natural Resources Conservation Service, 2011).
The high silt content in forest and pasture could be due to colluvium deposition due to gravity acting on the steep slopes.
The sampling will consist of approximately 500 rock and colluvium samples on a nominal 100-metre grid.
Soil and plant samples were collected from a selected area of 50 x 70 m at George Fischer colluvium plain with similar topographic feature to Mt Isa Mine tailings landscapes, ~26 km north of the Mt Isa Mine tailings impoundments.
Floodplain soils of the Alabama Piedmont are comprised of alluvium and colluvium derived from metamorphic rocks (Golden, 1979).
These deposits are actually mud-matrix supported colluvium produced by landslides or 'mass wasting'.
The highest erosion rate was observed on the roadcuts due to steep slopes, low vegetation cover and the presence of loose colluvium.
Locally overburden can comprise thick colluvium, in the form of talus, inactive alluvial fans, and kame terraces.
Context Source Hardinxveld- 1 marshy 1, 2 Giessendam layer 6 coarse sand Hardinxveld- 1 marshy 1, 2 Giessendam layer 70 coarse sand Hardinxveld- 3 colluvium 1, 2 Giessendam 60 coarse sand/peat Hardinxveld- 47 coarse sand 1, 2 Giessendam Rijswijk unknown unknown 3 Keinsmerbrug 2 unknown 3, 4 Schagen 96/2 partly dung 3, 5 Bovenkarspel 18/44 house ditch 1, 6 Westwoud 3 unknown 7 Vlaardingen 1 peaty house 1 foor Rotterdam 12 peat with 1 dung Maasland 40-50 organic 1 material/peat Santpoort many unknown 8 Vlaardingen 1 dung layer 1 in house Schiedam 18 dung layer 1 in ditch Schagen 51 pit 1 Den Haag 1 unknown 9 Schagen 16/78 pit with 1, 3 peaty filling Vlaardingen 75 unknown 1 Gouda 1 dung 1, 3 Sources: (1) Van Wijngaarden-Bakker and Troostheide 2003; (2) Oversteegen et al.
3] of the colluvium material moved towards the sea, affecting the left side of the alignment.