HierarchyKey	Term	Synonyms	Definition
1	whole	"dominant constituent, only part"	Component forms the entire unit; any other parts are incidental.
2	part		"Component is part of the unit, and there is at least one other significant part."
2-1	inclusions	"blocks, knockers, enclaves"	Bodies with generally sharp boundaries enclosed within a matrix of other material.
2-1-1	pendants		"Blocks of wall rock material in an igneous intrusion. Pendants become xenoliths as the dimension becomes smaller than about 10 m in their longest dimension. Although term pendant has connotation of being suspended or supported from above, this is rarely demonstrable in geologic situations, and the concept here does not require connection to the wall of the containing intrusion (Neuendorf et al 2005)."
2-1-2	concretions		"Masses or aggregates of mineral matter, normally sub-spherical but commonly oblate, disc-shaped or irregular, formed after deposition of the enclosing rock  Commonly formed by precipitation of (different) matrix minerals about a nucleus or center."
2-1-3	clasts		Fragments that were transported and deposited by sedimentary processes.
2-1-4	lenses	pods	"Discrete lens-shaped bodies, not connected with other bodies."
2-2	layers		
2-2-1	beds		Sedimentary layers with thickness in the mm to (rarely) decameter range.
2-2-1-1	marker bed		"Stratigraphic part that is a thin, laterally continuous, distinctive bed within a unit."
2-2-2	gneissic  layers	bands	Recurring layers within a coarse-grained metamorphic rock.
2-2-3	"veins, sills, or dikes"		"Intrusive, sheet-like bodies."
2-3	irregular bodies		
2-4	facies		"Particular body of rock that is a lateral variant of a lithostratigraphic  or lithodemic unit. Distinguished as a  body of rock that has identity, as opposed to a kind of rock body that is repeated in many places in a unit."
2-5	stratigraphic part	member	A geologic unit part that occupies a particular stratigraphic position within a geologic unit. Part is a particular body of rock (has identity).
2-6	matrix	wall-rock	Forms the body of the unit within which other described parts are contained.