GeologicUnit

What is a GeologicUnit?

Conceptually, a GeologicUnit may represent a body of material in the Earth whose complete and precise extent is inferred to exist (e.g., North American Data Model GeologicUnit, Stratigraphic unit in the sense of NACSN, or International Stratigraphic Code ), or a classifier used to characterize parts of the Earth (e.g. lithologic map unit like 'granitic rock' or 'alluvial deposit', surficial units like 'till' or 'old alluvium'). It includes both formal units (i.e. formally adopted and named in an official lexicon) and informal units (i.e. named but not promoted to a lexicon) and unnamed units (i.e., recognizable, described and delineable in the field but not otherwise formalised). In simpler terms, a geologic unit is a package of earth material (generally rock).

Realizations

Data model	Concept name	Definition
OGC GeoSciML	GeologicUnit	Conceptually, a GeologicUnit may represent a body of material in the Earth whose complete and precise extent is inferred to exist (e.g., North American Data Model GeologicUnit, Stratigraphic unit in the sense of NACSN, or International Stratigraphic Code ), or a classifier used to characterize parts of the Earth (e.g. lithologic map unit like 'granitic rock' or 'alluvial deposit', surficial units like 'till' or 'old alluvium'). It includes both formal units (i.e. formally adopted and named in an official lexicon) and informal units (i.e. named but not promoted to a lexicon) and unnamed units (i.e., recognizable, described and delineable in the field but not otherwise formalised). In simpler terms, a geologic unit is a package of earth material (generally rock).
IFC	GeologicUnit	Same as OGC GeoSciML
DIGGS	StratigraphyObservation	Descriptions of ordered bodies of rock or soil, such as formations, biostratigraphic units or aquifers.
AGSi	agsiModelElement	In AGSi a model is collection of elements (agsiModelElement object) and this may include geological units, identified as such (or as a specialization) using the elementType attribute.

Specializations (Types of GeologicUnit)

Source	Type	Link	Definition
BRGM	Registry	https://data.geoscience.fr/ncl/GeolUnitType	This register lists all the geologic units.
CGI	Registry	https://cgi.vocabs.ga.gov.au/object?uri=http%3A//resource.geosciml.org/classifier/cgi/geologicunittype	This register lists all the geologic units.

• allostratigraphic unit

• alteration unit

• artificial ground

• biostratigraphic unit

• chronostratigraphic unit

• deformation unit

• excavation unit

• geomorphologic unit

• geophysical unit

• lithodemic unit

• lithogenetic unit

• lithologic unit

• lithostratigraphic unit

• lithotectonic unit

• magnetostratigraphic unit

• mass movement unit

• pedoderm

• pedostratigraphic unit

• polarity chronostratigraphic unit

Properties

FAQ

What about Hydrogeologic Units?

They are a type of GeologicUnit and are described in https://github.com/opengeospatial/Geotech/wiki/HydrogeoUnit

GitHub issue

https://github.com/opengeospatial/Geotech/issues/7