alluvial deposit
- noun
- /əˈluːviəl dɪˈpɒzɪt/
- Specialized
:
depósito aluvial
- It is typically about three feet deep and is underlain by permeable alluvial deposits of sand and gravel, as well as by clay "lenses."
Examples
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The main soils are characterized by the accumulation of carbonates, more soluble salts, clay, and alluvial deposits.
Blog text (27) -
Then gold was discovered in the alluvial deposits of the Peixoto de Azevedo River, which crosses the region from east to west.
Academic text (2001) -
Miners followed gold flecked rivers deep into the mountains, searching for Nuggets, sifting through alluvial deposits and driving tunnels to mother loads.
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The farmers relied on the fertile alluvial deposits left by the river to cultivate their crops.
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After the flood, the landscape was reshaped with new alluvial deposits of sand and silt along the riverbank.
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Archaeologists discovered ancient tools buried in the alluvial deposits near the old riverbed.
Synonyms
78
3.5
A layer of sand or minerals that nature leaves over time
43
4.2
Small bits that collect at the bottom of water or other liquids
18
3.7
Fine soil left by moving water in a river or harbor
Loose soil and sand that water carries and leaves on banks or fields
Loose sand, clay, and small stones left by river water
Soil, sand or small stones that a river drops when it slows down
Fine earth left by rivers that is soft and very good for growing crops
How Coarse
Surface Forms
Morphology
The noun phrase is directly compositional: 'alluvial' means sediment deposited by water and 'deposit' means a layer left by natural processes, so the phrase denotes a deposit made by river-borne material. This simple adjective + noun structure is cross-linguistically common and follows ordinary English composition, so learners who know both constituents will readily infer the meaning.
Etymology
The noun alluvial deposit names the soil, sand, and small stones a river has carried and left behind. When the water slows, it drops or deposits this material on the riverbank or plain, so the phrase means 'material left by flowing water'.