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Grus (geology)

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Further information: Sharp sand Sand and gravel fragments accumulation
Grus sand and granitoid

Grus is an accumulation of angular, coarse-grained fragments (particles of sand and gravel) resulting from the granular disintegration by the processes of chemical and mechanical weathering of crystalline rocks (most notably granitoids) generally in an arid or semiarid region. Grus sand, when cemented into a sandstone, will form an arkose.

Within a European context most of the saprolite mantles of Late Cenozoic age are made up of grus, contrasting with Mesozoic and Early Cenozoic saprolites made up of kaolinitic and ferrallitic material.

See also

  • Exfoliation – Type of weathering jointPages displaying short descriptions of redirect targets
  • Saprolite – Chemically weathered rock

References

  1. Robert L. Bates; Julia A. Jackson, eds. (1984). Dictionary of Geological Terms (3rd ed.).
  2. Migoń, Piotr; Lidmar-Bergström, Karna (2002). "Deep weathering through time in central and northwestern Europe: problems of dating and interpretation of geological record". Catena. 49 (1–2): 25–40. Bibcode:2002Caten..49...25M. doi:10.1016/S0341-8162(02)00015-2.


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