In geology a bed is the smallest division of rock or deposit. It is a geologic formation or stratigraphic rock series marked by well-defined divisional planes (bedding planes) separating it from layers above and below.
In a quarry, bedding is a term used for a structure occurring in granite and similar rocks which allows them to split in well-defined planes horizontally or parallel to the land surface.
Engineering
In geotechnical engineering a bedding plane often forms a discontinuity that may have a large influence on the mechanical behaviour (strength, deformation) of soil and rock masses. This is important in, for example, tunnel, foundation, or slope construction.
