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Light-colored igneous rocks with a lower density than basaltic rocks?
Wiki User
∙ 15y ago
Felsic rocks.
Wiki User
∙ 15y ago
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True or false Light colored rocks with lower densities form from basaltic magma?
False.
How does the rock under the continents differ from rock under the oceans?
The rock of the continental crust is mostly granitic in composition, meaning it is a high silicate intrusive igneous rock. The rock of the oceanic crust is basaltic in origin, meaning it is lower in silica and higher in heavier elements like iron and magnesium and is classified as a mafic igneous rock. Oceanic crust is therefore more dense than continental crust.
Most basaltic magmas are believed to form by partial melting of granite in the lower crust and upper mantle?
This statement would be considered incorrect. Basaltic magmas originate from the melting of mantle rock or oceanic crust.
Why does the density of the atmosphere decrease with the height?
ice floats on top of water due to its lower density.... similarly, the gases with lower density lies in the upper atmospheric layers and the ones with larger density lie on the lower most atmospheric layers. so the overall density of air decreases with height.
What is the name of the igneous rock that is light enough to float?
Pumice, an extrusive igneous rock. Pumice is very porous and therefore allows air to get trapped when it is in water. Pumice stones are formed when lava cools quickly, they are usually white in colour and have a heavily pitted surface.
Why are granitic igneous rocks light in color?
granitic igneous rocks are light colored because of a lower density than basaltic rocks
What igneous rock is light colored and has a lower density?
Shutup! Jew!
Why does pumice have a lower density than other igneous rocks?
It is a glassy igneous rock, so there are holes in it. The holes make the rock less dense than other igneous rocks that are Not glassy.
What does the word felsic?
The word felsic is used to describe igneous rocks that are rich in silica and alkali feldspar. Such rocks tend to be light in color and have a lower density than other igneous rocks.
What and the difference between oceanic and continental?
Oceanic crust is mostly basaltic, which is denser, while continental crust is made from mostly basaltic and sedimentary rocks, which are less dense. This difference in density is why the oceanic crust sinks lower (thus the oceans) and the continental crust rides higher (thus the continents) on the mantle.
Are basaltic igneous rocks lower in density than granitic rocks?
Granite is very much less dense than basalt. This is why the continental crust (mostly composed of granite) floats on Oceanic crust (made mostly of basalt). Granite is 70 % silicon. Where basalt is mainly pyroxene.
Continental crust and the difference between oceanic crust?
Oceanic crust is mostly basaltic, which is denser, while continental crust is made from mostly basaltic and sedimentary rocks, which are less dense. This difference in density is why the oceanic crust sinks lower (thus the oceans) and the continental crust rides higher (thus the continents) on the mantle.
What kinds of lava do volcanoes with lower viscosity magma produce?
They produce basaltic lava.
In general how does the density of a light colored igneous rock differ from that of a dark colored igneous rock?
Light-coloured igneous rocks, such as granite, have a higher silica content and lower iron and magnesium than darker ones, such as basalt. Since iron and magnesium are very dense minerals, this makes darker igneous rocks more dense than lighter ones.
True or false Light colored rocks with lower densities form from basaltic magma?
False.
Does oil or water have a lower density?
Oil floats on water, and has a lower density.
How does the rock under the continents differ from rock under the oceans?
The rock of the continental crust is mostly granitic in composition, meaning it is a high silicate intrusive igneous rock. The rock of the oceanic crust is basaltic in origin, meaning it is lower in silica and higher in heavier elements like iron and magnesium and is classified as a mafic igneous rock. Oceanic crust is therefore more dense than continental crust.
