Is Basaltic Or Granitic Magma Hotter?

Main Differences Between Basalt and Granite

Basalt is a dense, dark, fine grained igneous rock of a lava flow or minor intrusion composed of labradorite and pyroxene. As against, Granite is a coarse-grained igneous rock composed of orthoclase and albite feldspars, and quartz.

How are granitic and basaltic lava and the rocks that they form different?

When granitic magma erupts from volcanoes it does so very explosively, indicating high gas content. … The basaltic magma is generated in the mantle, then rises into the continental crust. But, because basaltic magma has a high density it may stop in the crust and crystallize, releasing heat into the surrounding crust.

What is granitic magma?

Laboratory experiments suggest that when rocks with the composition of continental crust start to melt at temperature and pressure conditions found in the lower crust, a granitic liquid is formed, with 30 percent partial melting. …

What is basaltic magma?

Basaltic lava, or mafic lava, is molten rock enriched in iron and magnesium and depleted in silica. Basaltic magmas are formed by exceeding the melting point of the mantle either by adding heat, changing its composition, or decreasing its pressure. … Underwater, basaltic lavas are erupted as pillow basalts.

Is granitic magma wet or dry?

Why does granitic composition magma rarely make it to the surface? (Granitic magma is a wet melt and the melting temp increases with decreasing pressure so that is solidifies as is rises to the surface, aas pressure decreases. Opposite is true for dry basaltic magma (it further melts as it rises to the surface).

How is granitic magma formed?

generation. Granitic, or rhyolitic, magmas and andesitic magmas are generated at convergent plate boundaries where the oceanic lithosphere (the outer layer of Earth composed of the crust and upper mantle) is subducted so that its edge is positioned below the edge of the continental plate or…

What’s the difference between igneous rocks that have granitic composition andesitic composition and basaltic composition?

Granitic igneous rocks are light-colored rocks of lower density than basaltic rocks. 2. Granitic magma is thick and stiff and contains lots of silica but lesser amounts of iron and magnesium. Andesitic igneous rocks have mineral compositions between those of basaltic and granitic rocks.

What is the difference between magma and lava?

Magma is extremely hot liquid and semi-liquid rock located under Earth’s surface. When magma flows onto Earth’s surface, it is called lava.

Are basalt and granite the same?

Basalt and granite are similar in the they are both igneous, silicate rocks and common on Earth. They also have numerous differences. Basalt is extrusive, mafic, and common throughout the Solar System whereas granite is intrusive, felsic, and common only on Earth.

Which is harder basalt or granite?

Basalt weathers faster than granite because it is not as hard and it’s easier for outside substances to impact and manipulate its structure.

Why is basalt more dense than granite?

Granite is a felsic rock (which means it has a high feldspar and silica content), composed of quartz, potassium-rich feldspar, and mica. Mafic rocks contain denser minerals and therefore, oceanic crust is denser than continental crust (the average density of basalt is 3.0 g/cm3 and granite is 2.7 g/cm3).

Is basaltic magma fluid or viscous?

Viscosity of Magmas

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.

What is the difference between basaltic magma and rhyolitic magma list at least three characteristics for each type of magma?

List at least three characteristics for each type of magma. Basaltic Magma has a low silica content, causing it to have a low viscosity. Contrary, Rhyolitic Magma has a high silica content, causing it to have a high viscosity. Basaltic Magma is very mild and quiet, while Rhyolitic Magma is catastrophic.

How does basalt differ in appearance and composition from rhyolite?

The main difference between basalt and rhyolite is that basalt usually appears in dark colours, while rhyolite usually appears in light colours. … Basalt is an extrusive igneous rock type. Rhyolite is considered as an extrusive volcanic rock that is equivalent to granite.

What happens to most granitic magma after it forms?

Higher silica makes the magma viscous (stiff). So granitic magma solidifies in the crust easily, while basaltic magma can reach the surface. Water escapes from granitic magma when pressure decreases as it rises. Its solidification temperature rises, causing it to crystallize within the crust.

What is the difference between intrusive plutonic and extrusive volcanic igneous rocks?

Volcanic rocks are rocks formed when lava cools and solidifies on the earth’s surface. Volcanic rocks are also known as ‘extrusive igneous rocks’ because they form from the ‘extrusion,’ or eruption, of lava from a volcano. … Plutonic rocks are rocks formed when magma cools and solidifies below the earth’s surface.

How and why the plagioclase feldspar in basalt rocks differs from that in granitic rocks?

All feldspar minerals have two directions of perfect cleavage. … These properties make plagioclase feldspars relatively easy to identify with a hand lens in coarse-grained igneous and metamorphic rocks. Plagioclase in granitic rocks is normally white, pink, or red in color. In basaltic rocks it is normally gray to black.

How basaltic magma is formed?

Basaltic magma is formed through dry partial melting of the mantle. The mantle lies just below the crust of the earth. … This causes the temperature in the earth’s mantle to rise, which causes the mantle to partially melt. The partial melt contains both liquid and crystals that need a higher temperature to melt.

What process is thought to generate most granitic magmas and most basaltic magmas?

What is the process that is thought to generate most granitic magmas? A basaltic pond of magma becomes trapped below continental crust and partially melts this silica-rich crust into a granitic magma.

What is the meaning of granitic?

adjective. showing unfeeling resistance to tender feelings. synonyms: flint, flinty, obdurate, stony hardhearted, heartless. lacking in feeling or pity or warmth.

Is granitic magma is very silica rich?

Light-colored rocks with lower densities form from basaltic magma. Granitic magma is very silica-rich.

What is the difference between andesitic and basaltic lava?

Both lavas are formed at different plate boundaries which is why they have different silica contents: the basaltic lava forms from the hot mantle material at constructive plate boundaries and hotspots whereas the andesitic lava forms at destructive plate boundaries from melting crust.

What are the characteristics of basaltic lava?

Basalt is erupted at temperatures between 1100 to 1250 ° C. Volcanic rock (or lava) that characteristically is dark in color (gray to black), contains 45 to 53 percent silica, and is rich in iron and magnesium. Basaltic lavas are more fluid than andesites or dacites, which contain more silica.

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