| 词汇 | illuvial |
| 释义 | illuvial adjective geology specializeduk /ɪˈluː.vi.əl/ us /ɪˈluː.vi.əl/ related to or caused by illuviation(= the movement of substances from one layer of soil to a lower one): subsoil horizons where coatings of illuvial clay are deposited Most of the illuvial section is silica-armoured and is therefore likely to have resisted compaction. Related words illuviate illuviation Compare alluvial Soil evolution, through the development of an almost impervious illuvial horizon, reinforced the annual cycle of drought and waterlogging. Silica was therefore eluvial in the B horizon and illuvial in the A. Soil alluvial boulder clay clay clayey cover crop earthiness frozen humus lime loam ooze peat bog sandy sedimentation silt soil solarization solarize unploughed worm cast |
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