Tomuraushi Volcanic Group
Encyclopedia
is a volcanic group
in Hokkaidō
, Japan
. Along with the Daisetsuzan Volcanic Group
they make up the Ishikari Mountains
in Daisetsuzan National Park
. The group consists of andesite
and dacite
stratovolcano
es and lava dome
s.
Volcanic group
A volcanic group is a collection of related volcanoes or volcanic landforms. Note that the term is also used in a different sense when it denotes a suite of associated rock strata largely of volcanic origin; see group for details.-Notable volcanic groups:-See also:*Complex...
in Hokkaidō
Hokkaido
, formerly known as Ezo, Yezo, Yeso, or Yesso, is Japan's second largest island; it is also the largest and northernmost of Japan's 47 prefectural-level subdivisions. The Tsugaru Strait separates Hokkaido from Honshu, although the two islands are connected by the underwater railway Seikan Tunnel...
, Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...
. Along with the Daisetsuzan Volcanic Group
Daisetsuzan Volcanic Group
The is a volcanic group of peaks arranged around the wide caldera in Hokkaidō, Japan. In the Ainu language it is known as Nutapukaushipe or Nutaku Kamushupe. These peaks are the highest in Hokkaidō...
they make up the Ishikari Mountains
Ishikari Mountains
The is a range of volcanic mountains in central Hokkaidō, Japan. The mountain range is made up from the Daisetsuzan Volcanic Group and the Tomuraushi Volcanic Group. The volcanoes are part of the Kurile arc of the Pacific ring of fire.-References:...
in Daisetsuzan National Park
Daisetsuzan National Park
, or Taisetsuzan is located in the mountainous center of the northern Japanese island of Hokkaidō. At 2267.64 square kilometers, Daisetsuzan is the largest national park in Japan....
. The group consists of andesite
Andesite
Andesite is an extrusive igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture. In a general sense, it is the intermediate type between basalt and dacite. The mineral assemblage is typically dominated by plagioclase plus pyroxene and/or hornblende. Magnetite,...
and dacite
Dacite
Dacite is an igneous, volcanic rock. It has an aphanitic to porphyritic texture and is intermediate in composition between andesite and rhyolite. The relative proportions of feldspars and quartz in dacite, and in many other volcanic rocks, are illustrated in the QAPF diagram...
stratovolcano
Stratovolcano
A stratovolcano, also known as a composite volcano, is a tall, conical volcano built up by many layers of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic, explosive eruptions...
es and lava dome
Lava dome
|250px|thumb|right|Image of the [[rhyolitic]] lava dome of [[Chaitén Volcano]] during its 2008–2009 eruption.In volcanology, a lava dome is a roughly circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano...
s.
List of volcanoes
The following table lists the mountains in the volcanic group.| Name | Height | Type |
|---|---|---|
| 2141 metres (7,024.3 ft) | ||
| 1912 metres (6,273 ft) | Lava dome | |
| 1954 metres (6,410.8 ft) | Stratovolcano | |
| 1505 metres (4,937.7 ft) | Lava dome | |
| 1300 metres (4,265.1 ft) | Lava flow | |
| 1155.6 metres (3,791.3 ft) | Lava flow |