One of the mysteries of the English language finally explained.
Material which accumulates at the foot of a steep slope.
- ‘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.’
- ‘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.’
- ‘Deposits formed on hill slopes are called colluvium where they are fine-grained, and taluvium if they are of coarse-grained rock debris.’
- ‘Bronze Age and Neolithic pottery and flints from the basal soil and the colluvium indicate that a settlement was nearby.’
Mid 20th century: from Latin colluvies ‘confluence of matter’, from colluere ‘to rinse’, from col- ‘together’ + luere ‘to wash’.
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