Definition of colluvium in English:

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colluvium

Pronunciation: /kəˈl(j)uːvɪəm/

noun

[mass noun] Geology
Material which accumulates at the foot of a steep slope.
Example sentences
  • 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.
  • Deposits formed on hill slopes are called colluvium where they are fine-grained, and taluvium if they are of coarse-grained rock debris.
  • Archaeologists can use the evidence of pollen, alluvium (flood-deposits), and colluvium (hill-wash) to study the past environment.

Derivatives

colluvial

adjective
Example sentences
  • A few hundred metres to the east, the trachy-phonolitic breccias, debris flows, colluvial and alluvial deposits of Agulo record the volcanic activity and the erosion of the east flanks of the Vallehermoso stratovolcano.
  • Allochthonous sediments enter the cave system through a number of processes, including aeolian, fluvial, colluvial, biogenic, glacial, marine, and human activity.
  • In addition, secondary topaz crystals, released from matrix by erosional forces, have been found in both alluvial and colluvial sediments adjacent to topaz-bearing pegmatites.

Origin

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

For editors and proofreaders

Line breaks: col|lu¦vium

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