Due to their high volatile content, they have a high potential for explosion. How is felsic magma created? Some papers suggest that felsic magmas are produced by fractional crystallization and crustal ...

A solid crystal floats within the molten rock remaining. Magmas rich in felsic components such as quartz and orthoclase feldspar are higher in silica than those rich in igneous rocks. Magmas with a ...

Sometimes, after the explosive decompression phase dies out, the less gassy parts of the felsic magma chamber are oozed out, much like the last bit of toothpaste in a tube. When this lava flows ...

For decades, the oldest rock in the United States was considered Morton Gneiss, although a new contender has recently been ...

often involved in volcanic processes are mafic magma, which has less silica and is more fluid, and felsic magma, which has more silica and a thicker, toothpaste-like consistency. A third type of ...

Their models revealed that regions with crustal thicknesses exceeding 50 kilometers would have experienced widespread partial melting, producing felsic magmas either directly through dehydration ...

The physics of this are not well understood but it may be that convective overturn related to the intrusion of basaltic magma into a more felsic reservoir is an efficient driver of mixing ...

are often involved in volcanic processes -- mafic magma, which has less silica and is more fluid; and felsic magma, which has a higher silica content and a thicker consistency, like toothpaste.