welded tuff
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welded tuff — noun : a tuff deposit sufficiently thick and hot at the time of emplacement that the fragments soften and coalesce to form a rock which simulates rhyolite or obsidian * * * Petrol. ignimbrite … Useful english dictionary
welded tuff — A glass rich, pyroclastic rock composed of volcanic ash indurated at the time of deposition by the welding together of its glass shards under the combined action of the heat retained by particles, the weight of overlying material, and hot… … Glossary of landform and geologic terms
welded tuff — GLOSSARY OF VOLCANIC TERMS A hard pyroclastic rock compacted by internal heat and pressure from overlying pyroclastic deposits … Glossary of volcanic terms
Tuff — (from the Italian tufo ) is a type of rock consisting of consolidated volcanic ash ejected from vents during a volcanic eruption. Tuff should not be confused with tufa , another type of rock. Volcanic ashThe products of a volcanic eruption are… … Wikipedia
tuff — tuff1 /tuf/, adj. Slang. tough (def. 13). tuff2 tuffaceous /tu fay sheuhs/, adj. /tuf/, n. Geol. a fragmental rock consisting of the smaller kinds of volcanic detritus, as ash or cinder, usually more or less stratified. Also called volcanic tuff … Universalium
Bishop Tuff — The Bishop Tuff is located in the Owens Valley, southeast of Mammoth Lakes, California. It is a welded tuff that formed 760,000 years ago as a rhyolitic pyroclastic flow during the eruption that created the Long Valley Caldera.The Bishop Tuff… … Wikipedia
Lava Creek Tuff — is a tuff formation created when the Yellowstone Caldera erupted about 640,000 years ago.ref|ageThe Lava Creek Tuff distributed in a radial pattern around the caldera and is formed of convert|1000|km3|cumi|abbr=off|lk=off of ash in pyroclastic… … Wikipedia
Ignimbrite — is a volcanic pyroclastic rock, often of dacitic or rhyolitic composition. Ignimbrite is the deposit of a pumice rich pyroclastic density current, or pyroclastic flow , a hot suspension of particles and gases that flows rapidly from a volcano,… … Wikipedia
Glennies Creek Dam — Infobox lake lake name = Lake St Clair image lake = caption lake = image bathymetry = caption bathymetry = location = New South Wales coords = coord|32|21|S|151|17|E|type:waterbody region:AU|display=inline,title type = reservoir inflow = Glennies … Wikipedia
Yucca Mountain nuclear waste repository — Yucca Mountain The proposed design … Wikipedia
