from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Sediment deposited by flowing water, as in a riverbed, flood plain, or delta. Also called alluvion.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. soil, clay, silt or gravel deposited by flowing water, as it slows, in a river bed, delta, estuary or flood plain
from the GNU version of the Collaborative International Dictionary of English
- n. Deposits of earth, sand, gravel, and other transported matter, made by rivers, floods, or other causes, upon land not permanently submerged beneath the waters of lakes or seas.
from The Century Dictionary and Cyclopedia
- n. A deposit, usually of mingled sand and mud, resulting from the action of fluviatile currents: applied by geologists to the most recent sedimentary deposits, especially such as occur in the valleys of large rivers: opposed to diluvium (which see).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. clay or silt or gravel carried by rushing streams and deposited where the stream slows down
Thus, it does not show the extensive glacial deposits of the North Central and Northeastern States, the deep residuum of the Southeastern and South Central States, the relatively thin alluvium along many major rivers and basins, and extensive eolian deposits on the high plains.
As the shallow lake spreads under the boughs of the surrounding trees, it deposits a blanket of rich, fertilizing soil called alluvium.
The native of the alluvium is another being from the native of the great mineral State.
The Girl's Hall, a great three story building with seven thousand five hundred square feet of ground plan, had been slowly settling into this treacherous alluvium, which is three hundred feet deep to the first sand and gravel, until the building was in danger of falling.
The soil of the river valleys consists of waste carried down from higher levels, and is known as alluvium; it is the richest soil in the state.
This is a third triangle, containing above a thousand square miles of the richest alluvium, which is liable however to floods and to vast changes in the river beds, whereby often whole fields are swept away.
The Seven Great Monarchies Of The Ancient Eastern World, Vol 5. (of 7): Persia The History, Geography, And Antiquities Of Chaldaea, Assyria, Babylon, Media, Persia, Parthia, And Sassanian or New Persian Empire; With Maps and Illustrations.
Nowhere within the limits of the alluvium was a quarry to be found; and though at no very great distance, on the Arabian border, a coarse sandstone might have been obtained, yet in primitive times, before many canals were made, the difficulty of transporting this weighty substance across the soft and oozy soil of the plain would necessarily have prevented its adoption generally, or, indeed, anywhere, except in the immediate vicinity of the rocky region.
The Seven Great Monarchies Of The Ancient Eastern World, Vol 1. (of 7): Chaldaea The History, Geography, And Antiquities Of Chaldaea, Assyria, Babylon, Media, Persia, Parthia, And Sassanian or New Persian Empire; With Maps and Illustrations.
Except for the occasional ridges of metamorphic rocks mentioned above, and some hills of intruded greenstone, the lower plain is stoneless, its subjacent rocks being covered with a thicker stratum of the same alluvium which is thinly spread over the higher table-land above.
They are found in a sandy alluvium which is very boggy when wet.
Here and there, dwarf spruce, rooting and grovelling in the shallow alluvium, marked the proximity of the timber line.