Thus, basaltic magmas tend to be fairly fluid (low viscosity), but their viscosity is still 10,000 to 100,0000 times more viscous than water.
Rhyolitic magmas tend to have even higher viscosity, ranging between 1 million and 100 million times more viscous than water.
Given enough time, cold surface rock will yield to flowing water and buried rock will bend or even flow rather than break.
The planet's had ample time for all of this, even if it's out of our ken.
It closely coincides with the southern half of a complex, arcuate structural zone, the late Neoproterozoic to early Cambrian Lufilian Arc.Geologic understanding requires careful attention to time as well as three-dimensional space, so we'd better stop here first.If you're unfamiliar with geologic time terminology and abbreviations, take that detour now.(Note that solids, even though they appear solid have a viscosity, but it very high, measured as trillions time the viscosity of water).Viscosity is an important property in determining the eruptive behavior of magmas.
The Products of Volcanic Eruptions Lava Flows When magma reaches the surface of the earth, it is called lava.