alluvium
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Deposits of alluvium and volcanic ash have made desirable soil that is among the top 2% in the world.
From Seattle Times ● Jun. 16, 2023
Paved surfaces end miles from the rock outcrop, so we drive on overgrown rutted two-tracks that cross the loose sandy dune fields that show up on our geologic maps as “QAL”—Quaternary alluvium.
From Scientific American ● Dec. 15, 2020
Thus, a landscape architect I know savors the very smell of the dirt embedded in his botany texts; it is the alluvium of his life’s work.
From Slate ● Feb. 4, 2020
The island’s geology — a heart of granite in the west, compacted alluvium in the east — is such that most of it could be hollowed out.
From New York Times ● Apr. 20, 2017
Faults may occur in rocks of all ages; small local dislocations are observable even in glacial deposits, alluvium and loess.
From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2 "Fairbanks, Erastus" to "Fens" by Various
They are probably contemporary with the older alluvia.
From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg
I start with two Mason-bees of the Walls working at their nests on the pebbles in the alluvia of the Aygues, not far from Serignan.
From The Mason-Bees by Teixeira de Mattos, Alexander
But it is not often that borings come to be made in river alluvia.
From The Geological Story of the Isle of Wight by Hughes, J. Cecil
These subterranean vaults are usually filled in part with mud, pebbles, and breccia, in which bones occur belonging to the same assemblage of animals as those characterising the Post-pliocene alluvia above described.
From The Student's Elements of Geology by Lyell, Charles, Sir
Hence it was long and erroneously determined that bare rocks in the neighbourhood of shallow alluvia characterise rich placers, and that the wealthiest mining-regions are poor and stunted in vegetation.
From To The Gold Coast for Gold, Vol. II A Personal Narrative by Burton, Richard Francis, Sir
There are great tracts of alluviums lying along the banks of the Derwent, the Ouse, and the Trent, and the Romney Marsh of Kent along the banks of the Thames.
From The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide by Various
The whole of them were at first confounded with the superficial alluviums of Europe; and it was long before their real extent and thickness, and the various ages to which they belong, were fully recognised.
From The Student's Elements of Geology by Lyell, Charles, Sir
Besides, the last operations of water have a tendency to disturb and confound together all pre-existing alluviums.
From The Student's Elements of Geology by Lyell, Charles, Sir
Herculaneum was situated several miles nearer to the volcano, and has, therefore, been always more exposed to be covered, not only by showers of ashes, but by alluviums and streams of lava.
From Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology by Lyell, Charles, Sir
He pointed out with great clearness the resemblance of the tufaceous matter in the vaults and cellars at Herculaneum and Pompeii to aqueous alluviums, and its distinctness from ejections which had fallen through the air.
From Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology by Lyell, Charles, Sir
