An alloy is a mixture of metals or a mixture of a metal and another element.Alloys are defined by metallic bonding character.An alloy may be a solid solution of metal elements (a single phase) or a mixture of metallic phases (two or more solutions). Intermetallic compounds are alloys with a defined stoichiometry and crystal structure.he term alloy is used to describe a mixture of atoms in which the primary constituent is a metal. The primary metal is called the base, the matrix, or the solvent. The secondary constituents are often called solutes.
Marl or marlstone is a calcium carbonate or lime-rich mud or mudstone which contains variable amounts of clays and silt.
Lignite - sedimentary rock composed of 60%- 70% organic material; otherwise known as brown coal. Limestone - composed primarily of carbonate minerals. Marl - limestone with a considerable proportion of silicate material. Mudstone - clastic sedimentary rock that contains a mixture of silt- and clay-sized particles.