TERMIUM Plus®

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ABYSSAL DEPOSIT [1 record]

Record 1 2012-04-05

English

Subject field(s)
  • Hydrology and Hydrography
  • Geology
DEF

A deposit of the deep sea, accumulating in depths of more than 1,500 fathoms of water.

CONT

Deep-Sea Sediments. Sediments are particles (broken pieces, bits of stuff) that cover the ocean floor. Ocean sediments are typically “broken” into four categories: rocks carried off the land (lithogenous sediments), shells and other remains of dead organisms (biogenous sediments), chemicals that solidify out of ocean water (hydrogenous sediments), and dust and other particles that fall from outer space(cosmogenous sediments).

OBS

These deposits comprise the organic oozes, various muds, and red clay of the deepest regions.

Key term(s)
  • deep-sea sediment
  • deepsea sediment
  • deepsea deposit
  • abyssal sediment

French

Domaine(s)
  • Hydrologie et hydrographie
  • Géologie
DEF

Sédiments formés dans la mer, à plus de 2 000 m de profondeur.

CONT

Les sédiments de mers profondes. Le domaine marin [...] ne forme pas une seule unité de sédimentation; deux grandes catégories de dépôts le composent : les dépôts littoraux ou néritiques recouvrant le plateau continental et son rebord, et les dépôts abysso-pélagiques, sur les fonds dépassant 2 000 m de profondeur environ.

OBS

Sur les fonds dépassant - 2 500 m et jusqu'à 5 ou 6 mille mètres de profondeur, les apports terrigènes ne jouent pratiquement aucun rôle. On ne rencontre guère que des vases d'origine organique.

Key term(s)
  • sédiment abyssal
  • sédiment marin profond
  • sédiment de mer profonde

Spanish

Campo(s) temático(s)
  • Hidrología e hidrografía
  • Geología
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