Shores and Shallow Seas
Seas, oceans and lakes accumulate sediment over time. The sediment could consist of terrigenous material, which originates on land, but may be deposited in either terrestrial, marine, or lacustrine (lake) environments; or of sediments (often biological) originating in the body of water. Terrigenous material is often supplied by nearby rivers and streams or reworked marine sediment (e.g. sand). In the mid-ocean, living organisms are primarily responsible for the sediment accumulation, their shells sinking to the ocean floor upon death.
Deposited sediments are the source of sedimentary rocks, which can contain fossils of the inhabitants of the body of water that were, upon death, covered by accumulating sediment. Lake bed sediments that have not solidified into rock can be used to determine past climatic conditions.
Read more about this topic: Sediment
Famous quotes containing the words shores, shallow and/or seas:
“Who ordered, that their longing’s fire
Should be, as soon as kindled, cooled?
Who renders vain their deep desire?—
A God, a God their severance ruled!
And bade betwixt their shores to be
The unplumbed, salt, estranging sea.”
—Matthew Arnold (1822–1888)
“It is only shallow people who do not judge by appearances. The true mystery of the world is the visible, not the invisible.”
—Oscar Wilde (1854–1900)
“if thou slip thy troth and do not come at all.
As minutes in the clock do strike so call for death I shall:
To please both thy false heart, and rid myself from woe,
That rather had to die in troth than live forsaken so.”
—Unknown. The Lady Prayeth the Return of Her Lover Abiding on the Seas (l. 19–22)