GeologicUnitPart associates a GeologicUnit with another GeologicUnit that is a proper part of that unit. Parts may be formal or notional . Formal parts refer to a specific body of rock, as in formal stratigraphic members. Notional parts refer to assemblages of particular EarthMaterials with particular internal structure, which may be repeated in various places within a unit (e.g. 'turbidite sequence', 'point bar assemblage', 'leucosome veins')
Element to represent composition of a geologic unit in terms of earth material constituents. Lithology categories are associated with the compound material instances.
Description of bedding charactersitics (eg, bed thickness, bedding style or shape, patterns of variation in bedding thickness) in a geologic unit that has stratification.