A volume of rock with distinct characteristics. Includes both formal units (i.e. formally adopted and named in an official lexicon) and informal units (i.e. named but not...

This layer only applies to GeophStation spatial object types whose value from the StationTypeValue code list is seismologicalStation

Brittle to ductile style structures along which displacement has occurred. These range from from a simple, single 'planar' brittle or ductile surface to a fault system...