Northeastern Japan Arc: Difference between revisions
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[[Image:Japan trench topographic.png|right|thumb|235px|The [[Japan Trench]], where the [[Pacific Plate]] slides beneath the [[ |
{{short description|Island arc on the Pacific Ring of Fire}} |
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[[Image:Japan trench topographic.png|right|thumb|235px|The [[Japan Trench]], where the [[Pacific Plate]] slides beneath the [[Okhotsk Plate]] is the cause of the Northeastern Japan Arc]] |
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'''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 [[ |
The '''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 [[Tōhoku region]] of [[Honshu|Honshū]], [[Japan]]. It is the result of the [[subduction]] of the [[Pacific Plate]] underneath the [[Okhotsk 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 ([[:ja:フォッサマグナ|ja]]) 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 Islands|Kuril Island Arc]] in the volcanic [[Ishikari Mountains]] of central Hokkaidō. This collision formed the [[Teshio Mountains|Teshio]] and [[Yūbari Mountains]]. |
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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 |
The [[Ōu Mountains]] form the backbone of the volcanic part of the [[inner arc]] that run from [[Natsudomari Peninsula]] in [[Aomori Prefecture]] south to [[Mount Nikkō-Shirane]] in [[Tochigi Prefecture|Tochigi]] and [[Gunma Prefecture|Gunma prefectures]]. The [[volcanic front]] consists of four north to south lines of [[Quaternary]] volcanoes and calderas, which extend the length of the range. It also includes the Quaternary volcanoes of southwestern Hokkaido. The [[Dewa Mountains]] and the [[Iide Mountains]] are non-volcanic uplift ranges that run parallel to the west of the Ōu Mountains.<ref>{{cite journal|author=Gina L. Barnes|title=The Making of the Japan Sea and the Japanese Mountains|work=Japan Review|date=2008|jstor=25791318}}</ref> |
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The outer arc ranges are the [[Kitakami Mountains|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. |
The outer arc ranges are the [[Kitakami Mountains|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.<ref>{{cite web|title=Northeastern Honshu |url=http://www.glgarcs.rgr.jp/|archive-url=https://web.archive.org/web/20180209211430/http://www.glgarcs.rgr.jp/intro/ne_honshu.html|work=Introduction to the Landforms and Geology of Japan|date=2006|archive-date=9 February 2018|access-date=23 June 2020}}</ref> |
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==References== |
==References== |
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{{reflist}} |
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* [http://glgarcs.lad.jp/index.html GLGArcs], An Introduction to the Landforms and Geology of Japan, 2006, last access 2008-09-11. |
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[[Category:Geology of Japan]] |
[[Category:Geology of Japan]] |
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[[Category:Plate tectonics]] |
[[Category:Plate tectonics]] |
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[[Category:Volcanic arcs]] |
[[Category:Volcanic arcs]] |
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Latest revision as of 21:58, 22 October 2023
The 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 Tōhoku region of Honshū, Japan. It is the result of the subduction of the Pacific Plate underneath the Okhotsk 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 (ja) 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 Island Arc in the volcanic Ishikari Mountains of central Hokkaidō. This collision formed the Teshio and Yūbari Mountains.
The Ōu Mountains form the backbone of the volcanic part of the inner arc that run from Natsudomari Peninsula in Aomori Prefecture south to Mount Nikkō-Shirane in Tochigi and Gunma prefectures. The volcanic front consists of four north to south lines of Quaternary volcanoes and calderas, which extend the length of the range. It also includes the Quaternary volcanoes of southwestern Hokkaido. The Dewa Mountains and the Iide Mountains are non-volcanic uplift ranges that run parallel to the west of the Ōu Mountains.[1]
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.[2]
References
[edit]- ^ Gina L. Barnes (2008). "The Making of the Japan Sea and the Japanese Mountains". Japan Review. JSTOR 25791318.
- ^ "Northeastern Honshu". Introduction to the Landforms and Geology of Japan. 2006. Archived from the original on 9 February 2018. Retrieved 23 June 2020.