What 3 things does the viscosity of lava depend on?
What 3 things does the viscosity of lava depend on?
Temperature, composition, and volatile (gas) content largely determine the viscosity of lava. Temperature: The hotter the lava, the lower the viscosity (the thinner it is). The cooler the lava, the higher the viscosity (the thicker it is).
What are three factors determine magma viscosity?
A magma’s viscosity is largely controlled by its temperature, composition, and gas content (see downloadable programs at the bottom of this page). The effect of temperature on viscosity is intuitive. Like most liquids, the higher the temperature, the more fluid a substance becomes, thus lowering its viscosity.
What 3 things affect the characteristics of magma?
The factors that mainly affect in the formation of magma can be summarized into three: Temperature, Pressure and composition. Temperature plays a role in the formation of the melts in the magma. Generally magma has a temperature range from 700-1300 degrees Celsius.
What are 3 types of magma and what is their viscosity?
Viscosity of Magmas
| Summary Table | ||
|---|---|---|
| Magma Type | Solidified Rock | Viscosity |
| Basaltic | Basalt | Low |
| Andesitic | Andesite | Intermediate |
| Rhyolitic | Rhyolite | High |
How viscosity affects the movement of magma?
Heating reduces viscosity (warm syrup flows more easily than cold.) High viscosity lavas flow slowly and typically cover small areas. In contrast, low viscosity magmas flow more rapidly and form lava flows that cover thousands of square kilometers.
What are the three factors that influence viscosity of a lava quizlet?
Three factors that affect magma viscosity are temperature, composition, and presence of dissolved gases.
Which of the following magmas has the highest viscosity?
rhyolitic magma
The magma that has the highest viscosity is rhyolitic magma.
What three components make up most magmas?
Most magmas consist of three materials: a liquid component, a solid component, and a gaseous component.
What are the 3 types of magma?
There are three basic types of magma: basaltic, andesitic, and rhyolitic, each of which has a different mineral composition. All types of magma have a significant percentage of silicon dioxide. Basaltic magma is high in iron, magnesium, and calcium but low in potassium and sodium.
What is the higher viscosity of magma?
How does the volatile content of magma affect its viscosity?
Volatile Content: Magma invariably contains small amounts of dissolved gas (water, CO 2 etc) which is released as pressure is removed. Magmas formed by melting of mantle rocks have generally low volatile contents, but those formed by partial melting of crustal rocks are often volatile-rich. A high volatile content decreases viscosity…
How is the temperature of magma related to its melting point?
Eruptions are generally effusive. Magma temperatures reflect the melting points of their mineral components. Not surprisingly, magmas formed by partial melting of mantle rocks are much hotter – well over 1200 o C for some Hawaiian basalts – than is the case for crustally derived melts.
What kind of gas is released when magma is formed?
Magma invariably contains small amounts of dissolved gas (water, CO2 etc) which is released as pressure is removed. Magmas formed by melting of mantle rocks have generally low volatile contents, but those formed by partial melting of crustal rocks are often volatile-rich.
What is the viscosity of a mantle fluid?
Mantle fluid viscosities are predicted (10 −4 to 10 −3·7 Pa s) to be approximately half those of crustal fluids (10 −3·9 to 10 −3·1 Pa s) and of lower density (e.g. 1·4 compared to 1·6 g cm −3 ), reflecting their compositional differences (here mainly SiO 2 ).
