Stratigraphic unit (Geology terminology ⛰️)

A stratigraphic unit is a volume of rock of identifiable origin and relative age range that is defined by the distinctive and dominant, easily mapped and recognizable petrographic, lithologic or paleontologic features that characterize it. Units must be mappable and distinct from one another, but the contact need not be particula...

https://en.wikipedia.org/wiki/Stratigraphic_unit

#StratigraphicUnit #Stratigraphy #GeologicalUnits #GeologyTerminology