Geography
The islands are located on a shallow continental shelf with an average depth of 200 metres. However, in the Spratlys, the sea floor drastically changes its depth, and near the Philippines, the Palawan Trough is more than 5,000 metres deep. Also, there are some parts that are so shallow that navigation becomes difficult, and prone to accidents.
The sea floor contains Paleozoic and Mesozoic granite and metamorphic rocks. The abysses are caused by the formation of the Himalayas in the Cenozoic.
Except one volcano-island, the islands are made of coral reefs of varying ages and formations.
Read more about this topic: South China Sea Islands
Famous quotes containing the word geography:
“At present cats have more purchasing power and influence than the poor of this planet. Accidents of geography and colonial history should no longer determine who gets the fish.”
—Derek Wall (b. 1965)
“Where the heart is, there the muses, there the gods sojourn, and not in any geography of fame. Massachusetts, Connecticut River, and Boston Bay, you think paltry places, and the ear loves names of foreign and classic topography. But here we are; and, if we tarry a little, we may come to learn that here is best. See to it, only, that thyself is here;—and art and nature, hope and fate, friends, angels, and the Supreme Being, shall not absent from the chamber where thou sittest.”
—Ralph Waldo Emerson (1803–1882)
“The totality of our so-called knowledge or beliefs, from the most casual matters of geography and history to the profoundest laws of atomic physics or even of pure mathematics and logic, is a man-made fabric which impinges on experience only along the edges. Or, to change the figure, total science is like a field of force whose boundary conditions are experience.”
—Willard Van Orman Quine (b. 1908)