Question

in general how does the density of a light colored igneous rock differ from that of a dark ingneous rock

Answer 1

The density of igneous rocks is related to its color. Darker colored rocks have a higher density because of its greater mineral and iron content. Its characteristics is opposite compared to lighter colored rocks that have less density because of lower mineral and iron content. 

Answer 2

Answer:

The density of lighter-colored igneous rock is usually less than that of darker-colored igneous rock

Explanation:

Igneous rocks are formed from crystallization of magma or lava. Igneous rocks formed from magma are intrusive rocks and form below the earth's surface while those formed from lava are extrusive and form above the earth's surface.

Igneous rocks can also be classified based on their chemical composition. Igneous rocks with a higher composition of felsic minerals (feldspar, quartz) are lighter in color in comparison to those rocks with a higher composition of mafic minerals (magnesium, iron). Felsic minerals tend to be of a lighter colour and have a specific gravity less than 3.0 while mafic minerals are darker in color and have a specific gravity greater than 3.0

While the color and density of igneous rocks do correlate with each other due to the properties of the minerals, the color and density are not directly related to each other.