greenstone tuff

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• Slave craton — which is one of the oldest dated rock units on Earth at 4.03 Ga. The crust of the Slave craton is thought to have amalgamated during a 2.69 Ga collision between a proto Slave western basement complex, known as the Central Slave Basement Complex,… …   Wikipedia

• Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… …   Universalium

• Great Langdale — seen from the top of Rossett Pike …   Wikipedia

• Supervolcano — A supervolcano is a volcano capable of producing a volcanic eruption with an ejecta volume greater than 1,000 cubic kilometers (240 cubic miles). This is thousands of times larger than most historic volcanic eruptions.[1] Supervolcanoes can occur …   Wikipedia

• Sturgeon Lake Caldera — Infobox Mountain Name=Sturgeon Lake Caldera Photo= Caption= Elevation= approx. Unit m|455|0 Location=Ontario, Canada Range= Prominence = Coordinates = coord|49|52|13|N|91|00|10|W|type:mountain region:CA Topographic Type=Caldera Volcanic… …   Wikipedia

• Komatiite — Komatiites are ultramafic mantle derived volcanic rocks. They have low SiO2, low K2O, low Al2O3, and high to extremely high MgO. They were named for their type locality along the Komati River in South Africa. True komatiites are very rare and… …   Wikipedia

• Pike of Stickle — Infobox Mountain Name = Pike of Stickle Photo = Pike of Stickle from Loft Crag.jpg Caption = Pike of Stickle as seen from the neighbouring fell of Loft Crag Elevation = 709 m (2,326 ft) Location = Cumbria, ENG Range = Lake District, Central Fells …   Wikipedia

• Basalt — For the World War II raid, see Operation Basalt. For the cities, see Basalt, Colorado and Basalt, Idaho. Basalt Igneous Rock Composition …   Wikipedia

• schalstein — ˈshälˌs(h)tīn noun ( s) Etymology: German, from schale husk, shell (from Old High German scala) + stein stone, from Old High German more at scale …   Useful english dictionary

• List of rock types — This page is intended as a list of all rock types. NOTOC A : Amphibolite: Andesite: Anorthosite : Anthracite: Aplite: Argillite: Arkose B : Banded iron formation: Basalt: Basanite: Blueschist: Boninite: Breccia C : Carbonatite: Cataclasite: Chalk …   Wikipedia

• NIST stone test wall — The NIST stone test wall. The NIST stone test wall is an experiment by the United States National Institute of Standards and Technology to determine how different types of construction stone weather. It includes 2352 samples of stone from 47… …   Wikipedia