Bentonite clay mound, Arizona, USA
Summit crater of Hverfjall volcano, Iceland
Volcanic crater
Tephra surface of Hunga Tonga窶滴unga Ha'apai island
View of small volcanic ash mud-flows on snow
Solidified volcanic ash
Petrified Forest National Park Arizona: fossil tree trunks from c. 225 million years ago; mainly Araucarioxylon and Woodworthia. Fossilised in the Chinle layer Triassic era. USA
Tuff
Lapilli, lava droplets
Bentonite
Volcanic ash
New island formed by Hunga Tonga volcano, 2017
熊本県 阿蘇山
Layers of volcanic ash in rock
Bedded tuff with two piles of volcanic ash
Montmorillonite crystals in bentonite
熊本県 阿蘇山の道
砂千里ヶ浜
Welded Tuft
仙巌園 克灰袋
有珠山噴火で壊された工場
Volcanic ash, SEM
Araucarioxylon fossil wood
Petrified Forest National Park, Arizona, USA
路面電車 鹿児島
Badlands, John Day National Monument, USA
Midland Provincial Park
Slate quarry waste
Kaibito plateau
Isluga Volcano, Atacama, Chile
Pumice lava, SEM
Pumice from Mt St Helens (USA), SEM
Rio Blanco, Chaiten, Chile
鹿児島県 鹿児島市 黒神埋没鳥居
桜島 鹿児島
Ashfall Fossil Beds
阿蘇砂千里ヶ浜
阿蘇草千里ヶ浜登山ルートからみえる景色
Araucaria fossil wood
Calcium carbonate
Container of the food additive E558
阿蘇五岳
冬の阿蘇
阿蘇の噴煙
阿蘇の噴煙と草千里ヶ浜
阿蘇山噴火
夏の阿蘇
Mount Cleveland, Alaska, ISS image
都城市降灰のようす
霧の日の十勝
Nyamulagira volcano, Congo
Ashfall Fossil Beds display
Ashfall Fossil Beds excavation
Ashfall Fossil Beds fossils
Ashfall Fossil Beds research
阿蘇火山
Nabatean clay vessels
阿蘇中岳火口
Solheimajokull glacier, Iceland
Caldera Blanca, Lanzarote
噴火
Meltwater pond
Red scenery
御嶽山の降灰
Volcanic lava flow, artwork
Ash plume rising from a vent on Kilauea, May 2018
Hunga Tonga-Hunga Ha'apai volcano plume, satellite images
Lava block wall in Snafellsness, Iceland
大沸谷のガレ場のパノラマ写真
Terra-cotta Oil Lamps
硫黄山
Ethiopia, Danakli desert, Erta Ale volcano, eruption
硫黄山 川湯
川湯 硫黄山
Volcanic eruption
Street in Pompeii with stepping stones.
Lomagnupur cliff, Iceland
硫黄山の硫黄
北海道 硫黄山の噴煙
阿蘇の牧場で睡眠中の子馬
メタセコイアと阿蘇五岳
早春の南阿蘇村
南阿蘇村の河津桜
阿蘇のカルデラ