| 释义 |
eluvial, a.|ɪˈl(j)uːvɪəl|
[f. eluvi-um + -al1.]
1. Geol. Pertaining to, or of the nature of, eluvium.
1862G. P. Scrope Volcanos 172 There is another not unfrequent cause of such ‘eluvial’ debacles. 1881Geikie in Nature XXIII. 225 The superficial weathering of rocks, and the formation of ‘eluvial’ accumulations.
2. Soil Sci. Pertaining to a layer of soil which has undergone eluviation, as in eluvial horizon.
1924Geol. Mag. LXI. 451 Three main horizons are generally recognized,..the A or eluvial horizon, the B or illuvial horizon, and the C horizon, which consists of the parent material. 1934Forestry VIII. 26 The leached layer above being known as the eluvial horizon. 1952P. W. Richards Tropical Rain Forest ix. 208 All soils of the rain-forest region..are therefore strongly leached and have an eluvial horizon, or leached zone, above the illuvial horizon. 1963D. W. & E. E. Humphries tr. Termier's Erosion & Sedimentation vi. 138 A soil is composed of an impoverished zone, the eluvial horizon, and also a zone of enrichment or accumulation, the illuvial horizon. |