andesite and rhyolite as part of the subalkaline tholeiitic and calc-alkaline magma series. Dacite consists mostly of plagioclase feldspar and quartz with biotite...

at the Wayback Machine "Entrainé par les liaisons de cet objet avec la Géologie, j'entrepris dans un second voyage de les développer à SA MAJESTÉ; … "...

(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...

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...

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...

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...

explosion which occurs when groundwater comes into contact with hot lava or magma). A maar characteristically fills with water to form a relatively shallow...

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...

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...

continental crust, suggesting that under the Eifel is a hot zone where magma is rising. Persistent small earthquakes and underground heating. Map of...

about 300 million years ago. These natural stones were formed when large magma intrusions in the Brocken granite massif solidified at different cooling...

shaped and affected by intense volcanism; but individual intrusions of magma also forced their way through the sandstone platform of the Elbe Sandstone...

University of Lorraine 2018 - Bancroft Prize, Royal Society of Canada Géologie des gîtes minéraux. Ministère des Ressources Naturelles et de la Faune...

Springer. p. 47. ISBN 9783319695327. Maury, René C.; et al. (January 2014). "Géologie des Marquises : des volcansboucliers intra-océaniques effondrésissus d'un...

Robert J.; Szabó, Csaba (20 September 2021). "Massive methane fluxing from magma–sediment interaction in the end-Triassic Central Atlantic Magmatic Province"...

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...

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...

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...

Java to continue his research there. His main interest was in volcanology (magmas and pyroclastic rocks), structural geology and tectonics, especially sliding...

Melbourne has mainly erupted trachyandesite and trachyte, which formed within a magma chamber; basaltic rocks are less common. Geothermal heat flow on Mount Melbourne...

orogen-associated volcanism, volcanism typical of rifting zones is also found. Magma production through the Pliocene-Pleistocene has been low and volcanoes cover...

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...

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...

His research included studies of magma rock and salt deposits. Übersicht der Mineralogie, petrographie und Geologie der Kalisalz-Lagerstätten, 1909 –...

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...

another supergreenhouse interval. The production of large quantities of magma, variously attributed to mantle plumes or to extensional tectonics, further...

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...

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...

and seamount chains apart from a large range of crustal thicknesses and magma ascent paths, and different amount of crustal assimilations. The Andes Mountains...

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...