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ALLUVION PRIMITIVE [1 record]

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Record 1 2011-12-12

English

Subject field(s)
  • Geology
DEF

An upward fining sequence from cobble gravels to sand and silt [which] is interpreted as fluvial in origin.

CONT

Over the last 10,000 years, two periods of alluvial aggradation are noted within the Lower Snake River canyon: the early alluvium from 10,000 to 8,000 years BY.; and the middle alluvium from 4,000 to 2,500 years B.P.; each comprising terrace deposits (high and low, respectively).

French

Domaine(s)
  • Géologie
CONT

Au pied des coteaux, on trouve des alluvions anciennes qui se présentent à l'état de bandes étroites. Elles sont formées de dépôts en partie décalcifiés et rubéfiés (argiles sableuses et graviers siliceux, quartz, silex, granites, quelques galets de basalte).

Spanish

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