- stony rhyolite
- GLOSSARY OF VOLCANIC TERMS
Very finely crystalline rhyolite lava (Cas and Wright, 1987, p. 84).
Glossary of volcanic terms. - University of Wisconsin Oshkosh. G. J. Hudak. 2001.
Glossary of volcanic terms. - University of Wisconsin Oshkosh. G. J. Hudak. 2001.
Lava — flow redirects here. For the programming anti pattern, see Lava flow (programming). For other uses, see Lava (disambiguation) … Wikipedia
Papa Stour — Infobox Scottish island GridReference=HU169607 celtic name= norse name= Papey Stóra meaning of name= Norse for big island of the papar area=828 ha area rank=52 highest elevation= Virda Field 87 m Population=23 population rank=62 main… … Wikipedia
Principal national parks of the world — ▪ Table Principal national parks of the world Africa Europe and Russia Asia North America and the Caribbean Australia and Oceania South America Africa country national park date area description protected status national park status square miles… … Universalium
Pike of Blisco — Infobox Mountain Name = Pike of Blisco Photo = Pike O Blisco.jpg Caption = Pike of Blisco from the ridge of Wet Side Edge, between the Three Shire Stone and Great Carrs Elevation = 705 m (2,313 ft) Location = Cumbria, ENG Range = Lake District,… … Wikipedia
Dow Crag — from the Old Man of Coniston summit Elevation 778 m (2,552 ft) … Wikipedia
Caja del Rio — Volcanic plateau Country United States State Ne … Wikipedia
olivine — olivinic /ol euh vin ik/, olivinitic /ol euh vi nit ik/, adj. /ol euh veen , ol euh veen /, n. Mineral. any of a group of magnesium iron silicates, (Mg,Fe)2SiO4, occurring in olive green to gray green masses as an important constituent of basic… … Universalium
Ordovician Period — Interval of geologic time, 490–443 million years ago, the second oldest period of the Paleozoic Era. It follows the Cambrian and precedes the Silurian. During the Ordovician, many of the landmasses were aligned in the tropics. Life was dominated… … Universalium