, also known as just Yatsugatake is a

volcanic group A volcanic group is a stratigraphic group consisting of volcanic strata. They can be in the form of volcanic field A volcanic field is an area of Earth's crust that is prone to localized volcanic activity. The type and number of volcanoes ...

of inactive

volcano A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates ...

es located on the border of

Nagano Prefecture is a landlocked prefecture of Japan located in the Chūbu region of Honshū. Nagano Prefecture has a population of 2,052,493 () and has a geographic area of . Nagano Prefecture borders Niigata Prefecture to the north, Gunma Prefecture to the n ...

and

Yamanashi Prefecture is a prefecture of Japan located in the Chūbu region of Honshu. Yamanashi Prefecture has a population of 817,192 (1 January 2019) and has a geographic area of 4,465 km2 (1,724 sq mi). Yamanashi Prefecture borders Saitama Prefecture to the n ...

Honshū , historically called , is the largest and most populous island of Japan. It is located south of Hokkaidō across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyūshū across the Kanmon Straits. The island ...

in Japan.

Description

The Southern Yatsugatake Volcanic Group is part of the

Yatsugatake Mountains The are a volcanic mountain range on the border between Nagano Prefecture and Yamanashi Prefecture on the island of Honshū in Japan. Description The mountain range consists of two volcanic groups, Northern Yatsugatake Volcanic Group and Sout ...

. The southern group is defined as the mountains south of the Natsuzawa Pass. The highest peak of the mountains is Mount Aka and the elevation is 2,899 metres. The southern Yatugatake mountains are steep and have alpine characteristics. The mountains of the

Northern Yatsugatake Volcanic Group is a volcanic group of stratovolcanoes and lava domes located in Nagano Prefecture on Honshū in Japan. Description The Northern Yatsugatake Volcanic Group is part of the Yatsugatake Mountains. The northern group is defined as the mountains fro ...

are gentler and lower. This volcanic group is listed among the 100 famous mountains in Japan. There the mountains are listed as ''Yatsugatake''.

Mount Tateshina also Suwa Fuji is a complex volcano located on the border of the municipalities of Chino and Tateshina in Nagano Prefecture, Japan. It has an elevation of . This mountain is one of the 100 Famous Japanese Mountains. Outline Mount Tateshin ...

is also part of the Yatsugatake mountains, but is listed separately. These mountains are part of the Yatsugatake-Chūshin Kōgen Quasi-National Park.

Geology

The volcanoes are

stratovolcano A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava and tephra. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and p ...

es that are 1 million to 200,000 years old. The rock is mainly

basalt Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90% of a ...

and

andesite Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predomina ...

Climate

List of peaks

The following peaks make up the Southern Yatsugatake Volcanic Group:

Gallery

Image:Mt.Akadake from Mt.Gongendake 01.jpg, Mount Aka, the highest peak of the Yatsugatake mountains Image:Yatsugatake4.jpg, Mount Gongen, from Mount Aka Image:Mt.Akadake and Mt.Amidadake from Mt.Gongendake 01.jpg, Mount Amida, Mount Iō, Mount Yoko and Mount Aka from Mount Gongen Image:Amikasa01.JPG, Mount Amida, Mount Iō, Mount Yoko, Mount Aka and Mount Gongen from Mount Amigasa

References

External links

Welcome to YatsugatakeOfficial Home Page of the Geographical Survey Institute in Japan