Northeastern Japan arc


Northeastern Japan arc
The Japan Trench, where the Pacific Plate slides beneath the Okhotsk Plate is the cause of the Northeastern Japan Arc

Northeastern Japan Arc also Northeastern Honshū Arc, is an island arc on the Pacific Ring of Fire. The arc runs north to south along the Tohoku region of Honshū, Japan. It is the result of the subduction of the Pacific Plate underneath the North American Plate at the Japan Trench. The southern end of the arc converges with the Southwestern Japan Arc and the Izu-Bonin-Mariana Arc at the Fossa Magna at the east end of the Itoigawa-Shizuoka Tectonic Line (ITIL). This is the geologic border between eastern and western Honshū. Mount Fuji is at the point where these three arcs meet. To the north, the Northeastern Japan arc extends through the Oshima Peninsula of Hokkaidō. The arc converges in a collision zone with the Sakhalin island arc and the Kuril arc in the volcanic Ishikari Mountains of central Hokkaidō. This collision formed the Teshio and Yubari Mountains.

The Ōu Mountains form the volcanic part of the inner arc. The volcanic front consists of Quaternary volcanoes, which extend the length of the range. It also includes the Quaternary volcanoes of southwestern Hokkaidō. The Dewa Mountains and the Iide Mountains are non-volcanic uplift ranges that run parallel to the west of the Ōu Mountains.

The outer arc ranges are the Kitakami and the Abukuma Mountains. These mountains are made from pre-tertiary rock. The mountains rose in the Cenozoic and have since been worn smooth by erosion.

References

  • GLGArcs, An Introduction to the Landforms and Geology of Japan, 2006, last access 2008-09-11.

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Northeastern Japan Arc — also Northeastern Honshū Arc, is an island arc on the Pacific Ring of Fire. The arc runs north to south along the Tohoku region of Honshū, Japan. It is the result of the subduction of the Pacific Plate underneath the North American Plate at the… …   Wikipedia

  • Japan Median Tectonic Line — Red line represents Median Tectonic Line Japan Median Tectonic Line (中央構造線, Chūō Kōzō Sen …   Wikipedia

  • Japan Trench — The Japan Trench is an oceanic trench, a part of the Pacific Ring of Fire, in the floor of the northern Pacific Ocean off northeast Japan. It extends from the Kuril Islands to the Bonin Islands and is 9,000 m (30,000 ft) at its deepest. It is an… …   Wikipedia

  • japan — japanner, n. /jeuh pan /, n., adj., v., japanned, japanning. n. 1. any of various hard, durable, black varnishes, originally from Japan, for coating wood, metal, or other surfaces. 2. work varnished and figured in the Japanese manner. 3. Japans,… …   Universalium

  • Japan — /jeuh pan /, n. 1. a constitutional monarchy on a chain of islands off the E coast of Asia: main islands, Hokkaido, Honshu, Kyushu, and Shikoku. 125,716,637; 141,529 sq. mi. (366,560 sq. km). Cap.: Tokyo. Japanese, Nihon, Nippon. 2. Sea of, the… …   Universalium

  • Volcanic arc — Mariana Islands, an oceanic island arc A volcanic arc is a chain of volcanoes positioned in an arc shape as seen from above. Offshore volcanoes form islands, resulting in a volcanic island arc. Generally they result from the subduction of an… …   Wikipedia

  • Sakhalin island arc — is an ancient volcanic arc dating from the Early Miocene.cite book|last=Ivanov|first=Andrey |title=The Physical Geography of Northern Eurasia|editor=Shahgedanova, Maria|publisher=Oxford University Press|location=Google Books|date=March 27,… …   Wikipedia

  • Sea of Japan — Japanese name …   Wikipedia

  • Mariana Trench — This article is about the ocean trench. For the Canadian band, see Marianas Trench (band). Coordinates: 11°21′N 142°12′E / 11.35°N 142.2°E / 11.35; 14 …   Wikipedia

  • Mariana Plate — Map of the Mariana Plate (as Mariannes ) and its neighbouring plates (in French) …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.