It is common for silicate-rich magmas to form at destructive plate boundaries, by partial melting and / or assimilation of crustal rocks (richer in silica than the mantle rock). As basalts or gabbros, ...

Yellowstone’s upper magma chamber is just 2.3 miles deep, closer than previously thought, raising new questions about eruption risks. Scientists used advanced seismic imaging to map the magma system, ...

Additionally, the magma released by the volcanoes they studied was high in silica, a natural compound known to play a role in determining the viscosity and explosiveness of magma—with high ...

Some papers suggest that felsic magmas are produced by fractional crystallization and crustal assimilation8, partial melting of crusts 9, 10, and partial melting of metasomatised silica-excess ...

The depths, longevity, and potential to generate silicic compositions of magma chambers are linked to crustal temperature, which varies across Mars and over its geological history.

Yellowstone is most famous for huge explosive eruptions that create large calderas. Outside Yellowstone Caldera, however, ...

Due to their buoyancy, they tend to accumulate at the top of the magma chamber," he said. "But if there's a channel, they can ...

Due to their buoyancy, they tend to accumulate at the top of the magma chamber," he said. "But if there's a channel, they can escape to the surface." A high-silica type of igneous rock called ...

is lower in silica content, and is much more fluid. Geologists have long known that large, shallow rhyolite magma bodies like that at Yellowstone need a large supply of heat to remain active and ...