JewelSuite Subsurface Modeling makes use of the term event to describe a boundary. This can be a stratigraphic boundary (e.g. a horizon or unconformity), a structural boundary (e.g. a fault) or 'another type' of boundary (e.g. a fluid contact or mesh boundary). Each event can contain one or more geometric representations, where a geometric representation refers to the underlying data that defines the event. The application supports five types of geometric representations: tri-mesh, 2D grid, polyline set, point set and marker.

It is important to realize that you assign events, not the underlying data, to the zone boundaries in the stratigraphic model.