Definition of colluvium in English:



mass nounGeology
  • Material which accumulates at the foot of a steep slope.

    • ‘Archaeologists can use the evidence of pollen, alluvium (flood-deposits), and colluvium (hill-wash) to study the past environment.’
    • ‘Soils of the gap floor are Andover, a deep, poorly drained loam of low permeability derived from sandstone and shale colluvium.’
    • ‘Bronze Age and Neolithic pottery and flints from the basal soil and the colluvium indicate that a settlement was nearby.’
    • ‘Deposits formed on hill slopes are called colluvium where they are fine-grained, and taluvium if they are of coarse-grained rock debris.’
    • ‘In the southern part of the valley, the Serghaya Fault Zone follows the mountain front juxtaposing recent alluvium and colluvium against late Quaternary lake sediments, Neogene conglomerates, and Cretaceous carbonates.’


Mid 20th century: from Latin colluvies ‘confluence of matter’, from colluere ‘to rinse’, from col- ‘together’ + luere ‘to wash’.