What are the four kinds of igneous rock?

Answer 1

Igneous rocks are usually classified first by their color index. The color index is separated into four categories. Felsic rocks are the lightest and are composed of mostly quartz and potassium feldspar. Intermediate rocks are the second lightest and are made up of mostly plagioclase feldspar, pyroxene, amphibole, and biotite. Mafic rocks are made up of plagioclase feldspar, pyroxene, and amphibole. Ultramafic is made up of mostly olivine, with pyroxene and amphibole.

Answer 2

The four main types of igneous rocks are basalt, granite, andesite, and rhyolite. Basalt is a fine-grained rock, while granite is coarse-grained. Andesite and rhyolite fall between basalt and granite in terms of grain size and composition.

Answer 3

Gabbro, granite, basalt, and pumice