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
In the year 1308 few houses were yet standing on the Island formed by the alluvium and sand deposited by the Seine above the Cité, behind the Church of Notre-Dame.
From The Works of Honor? de Balzac About Catherine de' Medici, Seraphita and Other Stories by Honor? de Balzac
They are probably contemporary with the older alluvia.
From The Project Gutenberg Encyclopedia Volume 1 of 28 by Project Gutenberg
But it is not often that borings come to be made in river alluvia.
From The Geological Story of the Isle of Wight by J. Cecil Hughes
We see clearly the alluvia of two streams converging from right and left, and uniting to pass to the sea through Brading Harbour.
From The Geological Story of the Isle of Wight by J. Cecil Hughes
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 Sir Charles Lyell
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 Sir Richard Francis Burton
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
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 Sir Charles Lyell
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 Sir Charles Lyell
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 Sir Charles Lyell
In the course of ages, a new system of valleys was excavated, so that the rivers ran at lower levels than those at which the first alluviums and sheets of lava were formed.
From The Student's Elements of Geology by Sir Charles Lyell
