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) - 05:37, 9 June 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) - 06:39, 9 July 2024
the slightly alkaline andesites and dacites of the subalkaline igneous magma series, typical of subduction zones. The most visible crystals are numerous...
47 KB (4,684 words) - 04:52, 10 August 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...
14 KB (1,727 words) - 10:43, 5 April 2024
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
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) - 12:42, 2 April 2024
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...
149 KB (16,954 words) - 20:49, 10 August 2024
continental crust, suggesting that under the Eifel is a hot zone where magma is rising. Persistent small earthquakes and underground heating. Map of...
9 KB (982 words) - 16:44, 19 December 2023
about 300 million years ago. These natural stones were formed when large magma intrusions in the Brocken granite massif solidified at different cooling...
11 KB (1,323 words) - 09:40, 15 June 2023
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
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
orogen-associated volcanism, volcanism typical of rifting zones is also found. Magma production through the Pliocene-Pleistocene has been low and volcanoes cover...
12 KB (1,376 words) - 21:02, 23 September 2022
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
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) - 08:39, 12 April 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
His research included studies of magma rock and salt deposits. Übersicht der Mineralogie, petrographie und Geologie der Kalisalz-Lagerstätten, 1909 –...
3 KB (300 words) - 03:18, 19 March 2024
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
Springer. p. 47. ISBN 9783319695327. Maury, René C.; et al. (January 2014). "Géologie des Marquises : des volcansboucliers intra-océaniques effondrésissus d'un...
6 KB (645 words) - 20:13, 11 July 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
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
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...
3 KB (275 words) - 15:00, 4 February 2022
Robert J.; Szabó, Csaba (20 September 2021). "Massive methane fluxing from magma–sediment interaction in the end-Triassic Central Atlantic Magmatic Province"...
146 KB (15,660 words) - 04:49, 8 August 2024
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) - 09:02, 14 July 2024
another supergreenhouse interval. The production of large quantities of magma, variously attributed to mantle plumes or to extensional tectonics, further...
95 KB (9,847 words) - 15:10, 10 August 2024
Java to continue his research there. His main interest was in volcanology (magmas and pyroclastic rocks), structural geology and tectonics, especially sliding...
6 KB (655 words) - 17:21, 14 October 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 (6,944 words) - 16:52, 5 August 2024
the Outer Coast Tuff Formation, releasing about 30 cubic kilometers of magma, or passively due to regional tectonics, since the island is at the intersection...
39 KB (4,065 words) - 11:57, 20 July 2024