Boundaries of IBM Arc System
Crust and lithosphere produced by the IBM arc system during its ~50 Ma history are found today as far west as the Kyushu-Palau Ridge, up to 1,000 km from the present IBM trench. The IBM arc system is the surficial expression of the operation of a subduction zone and this defines its vertical extent. The northern boundary of the IBM arc system follows the Nankai Trough northeastward and onto southern Honshū, joining up with a complex system of thrusts that continue offshore eastward to the Japan Trench. The intersection of the IBM, Japan, and Sagami trenches at the Boso Triple Junction is the only trench-trench-trench triple junction on Earth. The IBM arc system is bounded on the east by a very deep trench, which ranges from almost 11 km deep in the Challenger Deep to less than 3 km where the Ogasawara Plateau enters the trench. The southern boundary is found where the IBM Trench meets the Kyushu-Palau Ridge near Belau. Thus defined, the IBM arc system spans over 25° of latitude, from 11°N to 35°20’N
Read more about this topic: Izu-Bonin-Mariana Arc
Famous quotes containing the words boundaries, arc and/or system:
“Ideas are not thoughts; the thought respects the boundaries that the idea ignores thereby failing to realize itself.”
—Franz Grillparzer (1791–1872)
“Male urination really is a kind of accomplishment, an arc of transcendance. A woman merely waters the ground she stands on.”
—Camille Paglia (b. 1947)
“Nobody is glad in the gladness of another, and our system is one of war, of an injurious superiority. Every child of the Saxon race is educated to wish to be first. It is our system; and a man comes to measure his greatness by the regrets, envies, and hatreds of his competitors.”
—Ralph Waldo Emerson (1803–1882)