Quantitative Classification of Igneous Rocks Based on Chemical and Mineral Characters, with a Systematic Nomenclature. By Whitman Cross Joseph P. Iddings Louis V. Pirsson Henry S. Washington ...

Minerals are chemical compounds which occur ... neutrons and electrons. Igneous rocks are formed from the cooling of molten rock. Molten rock is rock that has been heated to such a high ...

Primary minerals form at elevated temperatures from cooling magma during the original solidification of rock or during metamorphism, and they are usually derived from igneous and metamorphic rocks ...

There are three main rock types: igneous, sedimentary and metamorphic. These rocks are made of minerals that all have ...