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feature interface
CATEGORY: feature
DEFINITION: Unit of stratification resulting from the destruction of pre-existing stratification, rather than by the deposition of soils.
horizontal feature interface
CATEGORY: term
DEFINITION: The area associated with upstanding units of stratification and marking the interfacial levels to which the units have been dug.
horizontal layer interface
CATEGORY: term
DEFINITION: The surface of a natural or manmade layer, a unit of stratification. It takes the layer number of the deposit with which it is associated.
interface
CATEGORY: technique
DEFINITION: The point of contact between two layers or features in an excavation, stratigraphically important. An example is the point between the fill of a buried ditch and the soil through which it was dug.
interface of destruction
CATEGORY: technique
DEFINITION: An abstract interface which records the areas of a given unit of stratification or period on a site which has been destroyed by later excavation or disturbance.
period interface
CATEGORY: term
DEFINITION: The composite interface of a number of units of stratification which make up the surface of a period.
upstanding layer interface
CATEGORY: feature
DEFINITION: The face or original surface of an upstanding layer.
vertical feature interface
CATEGORY: feature
DEFINITION: A unit marking a distinct event, such as the digging of a pit, and resulting in the destruction of pre-existing stratification.

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