Hornblende-Schist, Mitsuishi（Hokkaido）: Field width = 8.8mm A caption is in the bottom.
The Image is XPL on mouse to PPL
北海道三石の角閃石片岩 横幅8.8mm．写真の下に説明．薄片写真：クロスポーラー（XPL)．マウスを乗せるとオープンポーラー（PPL)．
Across the central Hokkaido, there is a famous metamorphic belt named
"Kaumikotan" originated from the culture of indigenous people, the Ainu.
This metamorphic rocks are chracterized with low-temperature and
high-pressure metamorphic minerals. This sample contains a lot of
hornblendes, khaki to yelow and brown colored under XPL and pale dark
green under PPL. Others are plagioclases.
神居古潭変成帯は北海道の中央部に位置する．その名前は先住民のアイヌ文化から来ている．低温高圧型の変成鉱物が含まれる．
PPLで淡緑色，XPLでカーキ色や黄色茶色の鉱物は角閃石，その他の鉱物は斜長石．
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