Pset_GeoObsBoreholeGeoLogInterval Properties for geolog intervals. IfcGeoScienceObservation/BOREHOLELOG IfcGeoScienceObservation/BOREHOLELOG GeologyCode Reference to any existing classification, e.g. from ageological survey or stratigraphy table. Weathering Description of the physical and chemical changes produced by atmospheric agents in rocks or other deposits at or near the earth's surface. These changes result in disintegration and de composition of the material. FractureIndex Count of the number or spacing of fractures over an arbitrary length of core. RockQualityDesignation Length of solid core each pieces longer than 100 mm expressed as a ratio of the length of core run. TotalCoreRecovery Length of core recovered (solid and non-intact) expressed as a ratio of the length of core run. SolidCoreRecovery Length of solid core recovered expressed as a ratio of the length of core run.