Since the density of the glomerocrysts is greater than that of individual plagioclase crystals, it may play an important role in the fractionation process of plagioclase within a magma chamber
or intrusion (Hogan, 1993).
Some 14 million years later, a magma chamber
formed beneath this thin area of crust.
This approach can offer a fresh and complementary way of looking at processes in magma chambers
(Marsh, 1988; 1998; Higgins and Roberge, 2003).
The poikilocrystals most likely formed in a deeper and hotter setting, in a deep magma chamber
, whereas the matrix amphiboles probably formed within a shallow magma chamber
under the conditions of the final emplacement of the magma, and these amphiboles therefore record the depth and temperature of emplacement.
1987): Laser-interferometry study of oscillatory zoning in plagioclase: the record of magma mixing and phenocryst recycling in calc-alkaline magma chambers
, Iztaccihuatl volcano, Mexico.
In one eruption in November 2008 in the Afar rift, the magma chambers
proved to be unusually shallow about one kilometre below the surface rather than the three kilometres predicted by the standard model.
are located in which of Earth's layers?
The pits appear to have formed by the collapse of subsurface magma chambers
The filling of subvolcanic magma chambers
is the result of the rate of magma supply and the rate at which room is created by extension.
The magma chambers
are so close to the surface at this spa that they heat up the sand
Probably the most extreme example of segregation and accumulation is the formation of igneous bodies and magma chambers
It has long been realized that plutons contain a wealth of information important in unravelling the complex processes that operate in magma chambers