Pset_GeoObsLineation Properties for geological lineation observations. IfcGeoScienceObservation/MAPPEDFEATURE IfcGeoScienceObservation/MAPPEDFEATURE LineationType Flow lines, scratches, striae, slickenlines, linear arrangements of elongate components in sediments, elongate minerals, crinkles, and lines of intersection between penetrative planar structures. DefiningElement Kinds of describable inhomogeneity in a rock body that may define a geologic structure. Examples include oriented particle. DipDirection The geographic direction of a line created by the intersection of a plane and the horizontal plane. If non specific convention is used, this angular value is in the range 0 to 180 degrees. In this case, there is an ambiguity on the dip orientation. For example, a plane with an orientation of 90 degrees from the north could either have a dip direction to the North or to the South. Thus, to avoid this ambiguity, a strike value is generally completed with an indication of the dip orientation (Quadrant). Plunge The angle of inclination of the fold axis with the horizontal as measured in a vertical plane. DeformationPhase Name or label for a geologic event such as a basin formation, compressional tectonic phase, orogeny etc.