Bentonite clay mound, Arizona, USA
Volcanic crater
Summit crater of Hverfjall volcano, Iceland
Tephra surface of Hunga Tonga窶滴unga Ha'apai island
Tuff
Lapilli, lava droplets
Montmorillonite crystals in bentonite
New island formed by Hunga Tonga volcano, 2017
Bedded tuff with two piles of volcanic ash
View of small volcanic ash mud-flows on snow
Bentonite
Solidified volcanic ash
Araucarioxylon fossil wood
Petrified Forest National Park, Arizona, USA
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
Volcanic ash, SEM
Volcanic ash
熊本県 阿蘇山の道
熊本県 阿蘇山
砂千里ヶ浜
Layers of volcanic ash in rock
Ashfall Fossil Beds
Ashfall Fossil Beds display
Ashfall Fossil Beds excavation
Ashfall Fossil Beds fossils
Slate quarry waste
Welded Tuft
仙巌園 克灰袋
Pumice lava, SEM
Pumice from Mt St Helens (USA), SEM
Midland Provincial Park
Badlands, John Day National Monument, USA
Ashfall Fossil Beds research
Hominid footprints, Tanzania
Araucaria fossil wood
Belemnite shell fossilised in clay
Nyamulagira volcano, Congo
Kaibito plateau
Isluga Volcano, Atacama, Chile
有珠山噴火で壊された工場
路面電車 鹿児島
Rio Blanco, Chaiten, Chile
鹿児島県 鹿児島市 黒神埋没鳥居
Calcium carbonate
Container of the food additive E558
Teleoceras rhinoceroses in volcanic ashfall, illustration
Nebraska ashfall fossils, illustration
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
Caldera Blanca, Lanzarote
Volcanic cone, Iceland
Volcano above Heimaey, Iceland
桜島 鹿児島
阿蘇砂千里ヶ浜
阿蘇火山
阿蘇草千里ヶ浜登山ルートからみえる景色
Nabatean clay vessels
Ethiopia, Danakli desert, Erta Ale volcano, eruption
Volcanic eruption
Lomagnupur cliff, Iceland
硫黄山
硫黄山の硫黄
Petrified wood
大沸谷のガレ場のパノラマ写真
Belemnotheutis antiqua fossilised in clay
Blue Lias cliffs
Meltwater pond
Extracting mercury from ore
Mount Cleveland, Alaska, ISS image
霧の日の十勝
都城市降灰のようす
Lava block wall in Snafellsness, Iceland
セロアズル火山
Stromatolites on Early Earth
Volcanoes and water on Venus
硫黄山 川湯
川湯 硫黄山
Street in Pompeii with stepping stones.
北海道 硫黄山の噴煙
幻想的な光
Terra-cotta Oil Lamps
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
阿蘇中岳火口