Stratigraphic Volume Unit (A2) [en]

Stratigraphic Volume Unit

This class comprises connected portions of terrain or other solid structure on, in, or under
the surface of earth or seafloor exhibiting some homogeneity of structure or substance and
completely bounded by surfaces or discontinuities in substance or structure with respect to
other portions of the terrain or surfaces of objects/finds.

An instance of A8 Stratigraphic Unit may contain physical objects.
The internal continuity and the boundaries of an instance of A8 Stratigraphic Unit should
be of a kind that can be attributed to a single genesis event or process and have the
potential to be observed.

One genesis event may have created more than one SU.
An instance of A8 Stratigraphic Unit is regarded to exist as long as a part of its matter is
still in place with respect to a surrounding reference space such that its spatial features
can be associated with effects of the genesis process of interest. Normally at least one of
the surfaces (such as the lower one) from its genesis event will remain during its
existence.

This also implies that a certain degree of coherent (“conformal”) deformation is tolerable
within its time-span of existence. Therefore the place an instance of A8 Stratigraphic Unit
occupies can be uniquely identified with respect to the surrounding reference space of
archaeological interest.

The stratigrafic deposit unit representing the filling of a post
hole