When marble melts back into magma, its minerals separate and move around as liquid rock. Most magma consists of silicate minerals instead of carbonate...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough...
Usually, when a metamorphic rock melts the process occurs deep within the Earth near the mantle or in a magma chamber where temperatures are high...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your tough hom...
Iceland sits on a tectonic plate boundary that continually splits apart, pushing North America and Eurasia away from each other along the line of the Mid-Atlantic Ridge. A powerful mantle plume, an area that is hotter than the surrounding magma, sits below it, which melts and thins the Ea...
Second of all, this part of the Mid-Atlantic Ridge is the site of a mantle plume and a hot spot, similar to Hawaii. A mantle plume is a narrow upwelling of very hot rock that rises from Earth's core, while a hot spot is an area where extra hot magma melts and thins Earth's cru...
Many of the lunar rocks we have are incredibly old. The process of plate tectonics, in which the Earth's hot, fluid mantle moves continents and eventually transforms much of Earth's rock into magma, makes truly ancient rock a rarity here, says Jeremy Boyce, a planetary scientist at NASA’...
s solid-rock lid. As more magma and gas bubble up from below, the pressure builds and builds, as if the bottle is being shaken. Finally it bursts, releasing a thick cloud of vapour, ash and rocky debris that hovers above the volcano before collapsing into a pyroclastic flow. This is ...
In addition to forming a deep trench, subduction zones produce volcanic arcs. This occurs because, as the subducting plate descends into the mantle, the plate melts. This melted rock then rises to the surface, producing volcanic activity along a chain that runs parallel to the boundary. In the...
Another rock that provides diamonds is lamproite. The volcano that carries diamond to the surface emanates from deep cracks and fissures called dikes. It develops its carrot shape near the surface, when gases separate from the magma, perhaps accompanied by the boiling of ground water, and a ...
Under pressure and heat, this volatile mixture melts and then rises back up to lurk inside a large magma chamber just below ground. Unlike shield volcanoes, these chambers contain a lot of gas -a bit like a bottle of Prosecco- which can’t escape because of the volcano’s solid-rock lid...
Molten rock Melt To dissolve Sugar melts in water. Molten Made from a melted substance. en Melt To disappear or vanish gradually as if by dissolving The crowd melted away after the rally. Molten Glowing red-hot. Melt To pass or merge imperceptibly into something else Sea melted into sky alo...