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Pahoehoe is fast-moving,hot lava that has low viscosity.
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What is mafic lava like?
Fast moving-melted lava.
Hot fast moving lava?
The center of the earth is the hottest, and the crust is the furthest away from that heat.
What factors control the viscosity of magma and lava?
The three factors that control the viscosity of lava are temperature, composition and dissolved gases. When the temperature is hotter, there will be less viscous. When the composition has a higher silica content, there will be higher viscosity and a lower silica content means a lower viscosity. The gases will expand within the lava as it nears the surface of the Earth because of decreasing pressure.
Lava that is cooler and slower-moving is called?
valcanic movement
What is the difference between tephra and pyroclastic flow?
Tephra flow is fragments of volcanic rock and lava. Pyroclastic flow is fast moving current of hot gas and rock.
What is lava called with high viscosity?
Lava with high viscosity is called slica-rich lava
What is called hot fast-moving lava is called?
mafic
Which moves fast felsic lava or mafic lava?
A mafic lava flow will move faster than a felsic lava flow due to its lower viscosity. However, felsic magma tends to erupt explosively, producing fast-moving pyroclastic flows instead of lava flows.
How does the silica content of lava impact its viscosity?
Silica content is directly proportional to viscosity, so the higher the silica content of a lava, the higher its viscosity. high viscosity means a lava will be thick and slow moving, hence probably meaning an explosive eruption. lava's with a high viscosity include rhyolite and andesite whereas lava's with a low viscosity (runny ones) include basalt.
How does the viscosity affect of lava affect its flow rate?
Viscosity means how runny it is. Thus a lava with low viscosity will erupt fast and form long, wide spreading lava flows (eg Hawaii) and lavas of high viscosity will erupt slowly and form lava domes (eg Mt. St. Helens).
Are cinder-cone volcanos viscous?
It is thick, slow moving lava called Pyroclastic Flow.also known as high viscosity
What are the differences between pahoehoe and Aa what kind of eruption produces these types of lava-?
Pahoehoe is hot, fast-moving lava that has a low viscosity. AA lava has a cooler temperature and moves more slowly. Quiet eruptions are the type that produce these two types of lava.
What is mafic lava like?
Fast moving-melted lava.
How would viscosity of the lava affect the size of the crystals that forms in the rock as it cools?
If the lava has cooled fast, the Cristal's will be smaller. If the lava cooled slowly, the crystals will be big
How fast dose lava flow?
it all depends on the silica content which makes high or low viscosity
What type of lava does shield a shield volcano have?
Mafic, more commonly called Basaltic.
Does High viscosity lava flows faster than low viscosity lava?
No. Viscosity is a liquid's resistance to flow. So higher viscosity means a slower flow.
