Dacite (section Molten dacite magma at Kīlauea)
andesite and rhyolite as part of the subalkaline tholeiitic and calc-alkaline magma series. The word dacite comes from Dacia, a province of the Roman Empire...
17 KB (1,875 words) - 15:39, 25 August 2024
(primitive) magma formed from rock of the Earth's mantle that was nearly undepleted; that is, it was mantle rock rich in garnet and from which little magma had...
42 KB (4,896 words) - 11:47, 19 April 2024
circles] (in French). Retrieved 10 October 2020. C. Allègre : 12 Clés pour la géologie, Belin/France Culture, 1987. Original quote in French : En brûlant des...
13 KB (1,126 words) - 05:07, 15 September 2024
Géomorphologie. 10 (4): 305–316. Travaux du Comité français d'histoire de la géologie Cette plateforme est enlevée pour l'hiver. Cf "La plateforme scientifique...
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although it expelled a large volume of magma. This was probably attributed to a deep-than-usual location for its magma chamber, which, during the 1902 eruption...
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explosion which occurs when groundwater comes into contact with hot lava or magma). A maar characteristically fills with water to form a relatively shallow...
27 KB (2,868 words) - 08:29, 19 May 2024
Springer. p. 47. ISBN 9783319695327. Maury, René C.; et al. (January 2014). "Géologie des Marquises : des volcansboucliers intra-océaniques effondrésissus d'un...
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majority of cases, gathers in a magma chamber, several tens of kilometres deep, at the base of the Earth's crust, from which magma rises at irregular intervals...
83 KB (8,205 words) - 08:08, 20 August 2024
University of Lorraine 2018 - Bancroft Prize, Royal Society of Canada Géologie des gîtes minéraux. Ministère des Ressources Naturelles et de la Faune...
18 KB (1,930 words) - 16:20, 29 November 2023
iron). Native iron is also rarely found in basalts that have formed from magmas that have come into contact with carbon-rich sedimentary rocks, which have...
150 KB (17,056 words) - 12:22, 24 August 2024
joints in Earth's interior that could fill with magma. This was succeeded by a cooling phase, where the magma would freeze and become solid rock again, causing...
21 KB (2,271 words) - 18:28, 17 July 2024
stone is coarse-grained - this points to a slowly cooling of the lava / magma (at the time the formation of the stone). Forbach Granite is a bright mica...
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continental crust, suggesting that under the Eifel is a hot zone where magma is rising. Persistent small earthquakes and underground heating. Map of...
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orogen-associated volcanism, volcanism typical of rifting zones is also found. Magma production through the Pliocene-Pleistocene has been low and volcanoes cover...
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about 300 million years ago. These natural stones were formed when large magma intrusions in the Brocken granite massif solidified at different cooling...
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the slightly alkaline andesites and dacites of the subalkaline igneous magma series, typical of subduction zones. The most visible crystals are numerous...
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shaped and affected by intense volcanism; but individual intrusions of magma also forced their way through the sandstone platform of the Elbe Sandstone...
20 KB (2,302 words) - 23:07, 31 August 2024
years ago by the cooling of the magma which filled a 4 km long and 750m wide crevasse. In some areas, traces of the magma flow are still visible. The granite...
5 KB (727 words) - 16:53, 22 February 2021
Melbourne has mainly erupted trachyandesite and trachyte, which formed within a magma chamber; basaltic rocks are less common. Geothermal heat flow on Mount Melbourne...
84 KB (9,332 words) - 06:42, 20 April 2024
gneiss will make its way to the surface once again as country rock or as magma in a volcano, and the whole process will begin again. Mudrocks form in various...
24 KB (3,243 words) - 23:08, 5 May 2024
dolerite formations worldwide, are found in Tasmania. Here, the volume of magma which intruded into a thin veneer of Permian and Triassic rocks from multiple...
15 KB (1,677 words) - 14:56, 7 August 2024
and in the upper mantle. For a long time, the tectonic passivity of the magma was a dogma until Ampferer's undercurrent theory changed this in 1906. Ampferer...
11 KB (1,241 words) - 01:10, 16 January 2024
by degassed magma left behind by the caldera-forming eruption. The pre-caldera lava domes were generated either directly from a common magma chamber or...
35 KB (3,976 words) - 06:07, 14 June 2024
Robert J.; Szabó, Csaba (20 September 2021). "Massive methane fluxing from magma–sediment interaction in the end-Triassic Central Atlantic Magmatic Province"...
149 KB (15,968 words) - 05:16, 12 September 2024
His research included studies of magma rock and salt deposits. Übersicht der Mineralogie, petrographie und Geologie der Kalisalz-Lagerstätten, 1909 –...
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and last major transgression in the Cretaceous. The dispersal of extra magma warmed the water in the ocean, and was a conducive environment for calcareous-shelled...
24 KB (3,263 words) - 12:55, 2 May 2024
paragneiss contains a detrital zircon grain, whose core crystallised from a magma about 3.84 billion years ago during the Archaean eon. Whereas the Caledonian...
30 KB (3,310 words) - 11:59, 22 August 2024
ISSN 0016-7037. "Bienville Domain". Géologie Québec (in French). 24 July 2019. Retrieved 2019-10-07. Ciesielski, A (2000). Géologie et lithogéochimie de la partie...
53 KB (5,513 words) - 03:22, 27 December 2023
and seamount chains apart from a large range of crustal thicknesses and magma ascent paths, and different amount of crustal assimilations. The Andes Mountains...
60 KB (6,959 words) - 05:17, 31 August 2024