Igneous rock usually appears with a well mixed texture without fossils, bands or layers, may contain vesicles (air bubbles or holes from trapped gases) and does not react with dilute acid. Igneous...
Geologists study the texture and composition of minerals to identify metamorphic rocks. Metamorphic rocks are classified into two groups known as foliated and non foliated.
Igneous rocks are identified by first looking at the color index. Felsic igneous rocks contain mostly potassium feldspar. Intermediate igneous rocks contain mostly plagioclase feldspar. Mafic igneous...