eluvium

a deposit of soil, dust, or rock debris formed by the decomposition of rock
Not to be confused with:alluvion – overflow; floodalluvium – a deposit of sand, mud, silt, or gravel formed by flowingilluvium – the material accumulated through soil that has been leached out of another layer of soil

e·lu·vi·um

E0097900 (ĭ-lo͞o′vē-əm)n. pl. e·lu·vi·ums or e·lu·vi·a (-vē-ə) Residual deposits of soil, dust, and rock particles produced by the action of the wind.

[New Latin ēluvium, from Latin ēluere, to wash out; see elute.]

e·lu′vi·al (-əl) adj.

eluvium

(ɪˈluːvɪəm) n, pl -via (-vɪə) (Physical Geography) a mass of sand, silt, etc: a product of the erosion of rocks that has remained in its place of origin[C19: New Latin, from Latin ēluere to wash out] eˈluvial adj

e•lu•vi•um

(ɪˈlu vi əm)

n., pl. -vi•a (-vi ə) a deposit of soil, dust, etc., formed from the decomposition of rock and found in its place of origin. [1880–85; formed on the model of alluvium from Latin ēluere (of water) to wash out (soil, etc.); see elute]

Eluvium

eluvium

[ē′lü·vē·əm] (geology) Disintegrated rock material formed and accumulated in situ or moved by the wind alone.

Eluvium

loose deposits that occur when the original (parent) rock weathers at its place of origin. The eluvium comprises weathering crusts and soils.

A distinction is made between the orthoeluvium of crystalline (magmatic and metamorphic) rocks, the metaeluvium of consolidated sedimentary rocks, and the neoeluvium of young, unconsolidated deposits (in the last two cases, the parent rocks consist largely of redeposited and slightly altered products of weathering). The most characteristic type is orthoeluvium, which ranges in composition from pebbles and boulders in cold climates to clays in hot, humid climates. On the basis of degree of decomposition, a distinction is made between siallitic eluvium, in which the original aluminosilicates are preserved; acidic siallitic eluvium, which is composed chiefly of newly formed hydrous aluminosilicates of the group of clay minerals; and allitic, or ferralitic, eluvium, in which a significant share of the silicates have decomposed and are represented by free hydroxides of aluminum and iron.

E. V. SHANTSER

单词	eluvium
释义	eluvium eluvium a deposit of soil, dust, or rock debris formed by the decomposition of rock Not to be confused with:alluvion – overflow; floodalluvium – a deposit of sand, mud, silt, or gravel formed by flowingilluvium – the material accumulated through soil that has been leached out of another layer of soil e·lu·vi·um E0097900 (ĭ-lo͞o′vē-əm)n. pl. e·lu·vi·ums or e·lu·vi·a (-vē-ə) Residual deposits of soil, dust, and rock particles produced by the action of the wind. [New Latin ēluvium, from Latin ēluere, to wash out; see elute.] e·lu′vi·al (-əl) adj. eluvium (ɪˈluːvɪəm) n, pl -via (-vɪə) (Physical Geography) a mass of sand, silt, etc: a product of the erosion of rocks that has remained in its place of origin[C19: New Latin, from Latin ēluere to wash out] eˈluvial adj e•lu•vi•um (ɪˈlu vi əm) n., pl. -vi•a (-vi ə) a deposit of soil, dust, etc., formed from the decomposition of rock and found in its place of origin. [1880–85; formed on the model of alluvium from Latin ēluere (of water) to wash out (soil, etc.); see elute] Eluvium eluvium [ē′lü·vē·əm] (geology) Disintegrated rock material formed and accumulated in situ or moved by the wind alone. Eluvium loose deposits that occur when the original (parent) rock weathers at its place of origin. The eluvium comprises weathering crusts and soils. A distinction is made between the orthoeluvium of crystalline (magmatic and metamorphic) rocks, the metaeluvium of consolidated sedimentary rocks, and the neoeluvium of young, unconsolidated deposits (in the last two cases, the parent rocks consist largely of redeposited and slightly altered products of weathering). The most characteristic type is orthoeluvium, which ranges in composition from pebbles and boulders in cold climates to clays in hot, humid climates. On the basis of degree of decomposition, a distinction is made between siallitic eluvium, in which the original aluminosilicates are preserved; acidic siallitic eluvium, which is composed chiefly of newly formed hydrous aluminosilicates of the group of clay minerals; and allitic, or ferralitic, eluvium, in which a significant share of the silicates have decomposed and are represented by free hydroxides of aluminum and iron. E. V. SHANTSER FinancialSeeeluviation
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