Because granitic rocks are poor in iron and magnesium, which gives basaltic rocks it dark color.
The three families of igneous rocks are basaltic (mafic), andesitic (intermediate), and granitic (felsic). These families are classified based on their silica content and mineral composition, which in turn influence their color, density, and overall characteristics.
Basalt is the igneous rock that forms when basaltic lava cools and hardens. It is fine-grained and dark in color, typically containing minerals such as pyroxene and plagioclase.
baslt
Granitic rock is intrusive igneous rock, meaning that it has been formed from the slow cooling of magma underground and will have visible crystals. Granitic, in general, refers to a mineral composition that is felsic in nature, meaning it consists of 69% or more silicate minerals, like quartz, alkali feldspars, and micas.
The three kinds of Earth Igneous Rocks are: basaltic (mafic), granitic (felsic), and intermediate (andesitic). These rock types vary in their mineral composition, color, density, and overall characteristics based on the amount of silica and other elements present. Each type forms from different magma compositions and processes within the Earth's crust.
granitic igneous rocks are light colored because of a lower density than basaltic rocks
The three families of igneous rocks are basaltic (mafic), andesitic (intermediate), and granitic (felsic). These families are classified based on their silica content and mineral composition, which in turn influence their color, density, and overall characteristics.
Dark green to black.
Granite igneous rocks are lighter in color than basaltic rocks primarily due to their mineral composition. Granite is rich in light-colored minerals such as quartz and feldspar, which contribute to its lighter hues. In contrast, basaltic rocks contain a higher proportion of dark-colored minerals like pyroxene and olivine, resulting in their darker appearance. This difference in mineralogy reflects the varying magma compositions from which these rocks are formed.
Generally dark with shades of green and black.
Basalt is the igneous rock that forms when basaltic lava cools and hardens. It is fine-grained and dark in color, typically containing minerals such as pyroxene and plagioclase.
Basaltic igneous rocks are fine-grained and have a low silica content. They are typically dark in color, ranging from black to dark gray. They form from the rapid cooling of basaltic magma and are commonly found in oceanic crust and volcanic islands.
baslt
Continental crust is mainly composed of granitic rocks such as granite and rhyolite, which are light in color and less dense. Oceanic crust is primarily composed of basaltic rocks, specifically basalt, which are dark in color and more dense than granitic rocks.
The more silica contained in a rock, the lighter in color it will be.
Granitic rock is intrusive igneous rock, meaning that it has been formed from the slow cooling of magma underground and will have visible crystals. Granitic, in general, refers to a mineral composition that is felsic in nature, meaning it consists of 69% or more silicate minerals, like quartz, alkali feldspars, and micas.
The more silica contained in a rock, the lighter in color it will be.