Mount Yatsugatake - AbsoluteAstronomy.com

, also just Yatsugatake is a volcanic group

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...

of inactive volcano

Volcano

2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...

es located on the border of Nagano Prefecture

Nagano Prefecture

is a prefecture of Japan located in the Chūbu region of the island of Honshū. The capital is the city of Nagano.- History :Nagano was formerly known as the province of Shinano...

and Yamanashi Prefecture

Yamanashi Prefecture

is a prefecture of Japan located in the Chūbu region of the island of Honshū. The capital is the city of Kōfu.-Pre-history to the 14th century:People have been living in the Yamanashi area for about 30,000 years...

on Honshū

Honshu

is the largest island of Japan. The nation's main island, it is south of Hokkaido across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyushu across the Kanmon Strait...

in 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...

Description

The Southern Yatsugatake Volcanic Group is part of the Yatsugatake Mountains

Yatsugatake Mountains

The Yatsugatake Mountains are a volcanic mountain range on the border between Nagano Prefecture and Yamanashi Prefecture on the island of Honshū in Japan.-Description:...

. The southern group is defined as the mountains south of the Natsuzawa Pass. The highest peak of the mountains is Mount Aka

Mount Aka (Yatsugatake)

is a 2,899m mountain on the border of Chino, Hara of Nagano, and Hokuto of Yamanashi in Japan. This mountain is the tallest mountain of Yatsugatake Mountains.- Description :...

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

Northern Yatsugatake Volcanic Group

, also just Kita Yatsugatake is a volcanic group of stratovolcanoes and lava domes located in Nagano Prefecture on Honshū in Japan.-Description:...

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

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:...

is also part of the Yatsugatake mountains, but is listed separately.

These mountains are part of the Yatsugatake-Chūshin Kōgen Quasi-National Park

Yatsugatake-Chushin Kogen Quasi-National Park

is a quasi-national park on Honshū in Japan. It is rated a protected landscape according to the IUCN. The park includes the Yatsugatake Mountains and the surrounding lava plateaus: Tateshina plateau, Kirigamine, and Utsukushigahara. It straddles the border between Nagano and Yamanashi prefectures....

Geology

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

Basalt

Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey...

and 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,...

List of peaks

The following peaks make up the Southern Yatsugatake Volcanic Group:

Name	Height
	2899.2 metres (9,511.8 ft)
	2829 metres (9,281.5 ft)
	2805 metres (9,202.8 ft)
	2760 metres (9,055.1 ft)
	2715 metres (8,907.5 ft)
	2523.7 metres (8,279.9 ft)
	2398 metres (7,867.5 ft)
	1542.4 metres (5,060.4 ft)