| 单词 | alluvium |
| 释义 | alluvium noun[U] geologyspecializeduk/əˈluː.vi.əm/us/əˈluː.vi.əm/earthandsandthat has beenleftbyrivers,floods, etc. （河流或洪水）冲积形成的，淤积的 Alexis Gonzalez/iStock/Getty Images Plus/GettyImages The Earth & outer space - general words
Examplesofalluviumalluvium Regenerative growth in fossil horsetails following burial byalluvium. From theCambridge English Corpus Under backwater conditions, fine-grainedalluviumof 15 m thickness was deposited in the reach upstream from the lava dam. From theCambridge English Corpus On average, surface soil nutrient content is highest in thealluvium, lowest in granite and intermediate in sedimentary soils. From theCambridge English Corpus This recentalluviumis topped by welldrained soils that remain moist through seepage and capillarity during the dry season; they are prime agricultural land. From theCambridge English Corpus These losses cannot be compensated by weathering of the parent material, since the oldalluviumon which these soils have evolved has been thoroughly weathered before sedimentation. From theCambridge English Corpus Both plutons seem to represent a single entity as they are contiguous, and the intervening area between them of about 1000 m is concealed underalluviumand sand dunes. From theCambridge English Corpus The river valley consists of porousalluviumthat constitutes a huge aquifer that is recharged mostly from the river while providing late season flow back into the river. From theCambridge English Corpus The road crosses alternating layers of sandstone, shale and mudstones which are overlain by variable depths of glacial clays, sands and gravels,alluviumand industrial fill. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under theOpen Parliament Licence v3.0 Any such valley which is suitable will almost certainly havealluviumat the bottom and be farmland even if the sides of the valley are rough pasture and grazing. From the Hansard archive Example from the Hansard archive. Contains Parliamentary information licensed under theOpen Parliament Licence v3.0 The floodplains of the majority of watercourses in the county are composed ofalluviumwhich has accumulated in the post-glacial period. From Wikipedia  This example is from Wikipedia and may be reused under a CC BY-SA license.As a result of shortening, streambeds of nearby washes are filled with blackalluvium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Then these correctly summarised data must be compared with various phases of the contemporary mountainousalluviumat the analogous sections. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Within the lake area, the ground area is made up of a thick mantle of soil, blown sand andalluvium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.The river floodplain is made up of mixedalluvium. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.Growing on sand,alluviumand volcanic based soils. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license.These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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