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Mashu Caldera
Platzhalter
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The Caldera Lake Mashu with a 7.5 km major axis and 5 km minor axis was formed less then 32'000 years ago and is surrounded by steep up to 200 metres high crater walls. It forms together with the Kussharo Caldera and Akan Caldera the Akan Nationalpark.

Two volcanoes have grown out of the Mashu caldera: The lava dome Kamuishu, which rises as an island from the middle of the lake, and the Mashu-dake, also known as Mt. Kamuinupuri or Mt. Kamui.

 

mountainstamp.com Mashu Crater and Mashu Dake Volcano Mountain stamp 1950

 

Japan 1950, Lake Mashu.
The stamp was issued in sheets of 20 stamps and in the miniaturesheet "Akan Nationalpark".

 

mountainstamp.com Mashu Crater and Mashu Dake Volcano Mountain stamp 2003

Japan 2003
The Mashu caldera lake with the lave dome Kamuishu, which rises from the middle of the lake, and the Mashu-dake (857 metres) on the right.

 

mountainstamp.com Mashu Crater and Mashu Dake Volcano Mountain stamp 2010

Japan 2010, the frozen Mashu caldera lake with the Mashu-dake (857 metres) on the right.

 

mountainstamp.com Mashu Crater and Mashu Dake Volcano Mountain stamp 2010

Japan 2011, Mashu caldera lake with the Kamuishu Island and the Mashu-dake.
The stamp was issued in the sheet "Hokkaido Scenes from Autumn to Winter".

note:
The Mashu caldera lake is shown as illustration on two probably not official miniaturesheets from Mozambique 2002/2005 "Celebrate Rotary 1905 - 2005".

 

 

 

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