The crust of the earth is made up of a variety of materials, but most of the earth's outer mass consists of rock composed of minerals. Without at least an elementary knowledge of the minerals and the rocks they form, it is impossible to understand and interpret the portion of the earth's crust with which the engineer must work. DEFINITION OF A MINERAL 2-2. A mineral is a naturally occurring, homogeneous solid, inorganically formed, with a definite chemical composition and an ordered atomic arrangement. All possible artificial substances are excluded from consideration. The physical state of a mineral is necessarily solid. Liquids or gases are not considered when speaking of a mineral. A mineral cannot be formed from an organic source, it must be inorganically formed.
DesignationTM 3-34.61
EditionFeb 2013
StatusSuperseded
Pages162
FunctionEngineering
CollectionRecent Archive
DISTRIBUTION RESTRICTION: Approved for public release; distribution is unlimited. HEADQUARTERS, DEPARTMENT OF THE ARMY Publication of TM 3-34.