SWEET Ontology
type: Ontology
version info: 2.3
imports: matrRockIgneous.owl
imports: matr.owl
imports: realmGeol.owl
imports: rela.owl
imports: relaPhysical.owl
imports: relaChemical.owl
imports: relaSci.owl
imports: realmGeolBasin.owl
imports: stateRoleGeographic.owl
imports: realmLandTectonic.owl

ContinentalCrust
type: Class
subclass of: Crust
subclass of: Continental
subclass of: Restriction
  on property: hasRock
  some values from: Felsic
subclass of: Restriction
  on property: partOf
  all values from: ContinentalLithosphere
comment: The continental crust is typically from 30 km (20 mi) to 50 km (30 mi) thick, and it is mostly composed of less dense rocks, such as granite, than is the oceanic crust. The continental crust has an average composition similar to that of the igneous rock, andesite.[Wikipedia]

ContinentalLithosphere
type: Class
subclass of: Lithosphere
subclass of: Continental
subclass of: Restriction
  on property: hasPlanetaryStructure
  all values from: Craton
comment: [Mechanical or Seismic Definition of Structure] In the Earth, the lithosphere includes the crust and the uppermost mantle, which constitute the hard and rigid outer layer of the planet. The [Wikipedia]

ActiveContinent
type: Class
subclass of: GeologicProvince
subclass of: Restriction
  on property: partOf
  all values from: ContinentalLithosphere
comment: A distinction of whether the continental margins are active (subducting). [Wikipedia]

StableContinent
type: Class
subclass of: GeologicProvince
subclass of: Restriction
  on property: partOf
  all values from: ContinentalLithosphere
comment: A distinction of whether the continental is on a stable paltform, i.e., over millions of years. [Wikipedia]

Craton
type: Class
subclass of: GeologicProvince
subclass of: Restriction
  on property: partOf
  all values from: ContinentalCrust
subclass of: Restriction
  on property: hasPlanetaryStructure
  all values from: ContinentalPlatform
subclass of: Restriction
  on property: hasPlanetaryStructure
  all values from: Shield
subclass of: Restriction
  on property: hasSubstance
  all values from: Kimberlite
subclass of: Restriction
  all values from: IntracratonicBasin
  on property: hasPlanetaryStructure
comment: A craton is an old and stable part of the continental crust that has survived the merging and splitting of continents and supercontinents for at least 500 million years. Some are over two billion years old. Cratons are generally found in the interiors of continents and are characteristically composed of ancient crystalline basement crust of lightweight felsic igneous rock such as granite. They have a thick crust and deep roots that extend into the mantle beneath to depths of 200 km. [Wikipedia]

Supercontinent
type: Class
subclass of: GeologicProvince
subclass of: Restriction
  on property: hasPlanetaryStructure
  all values from: Craton
subclass of: Restriction
  on property: hasRealm
  all values from: ContinentalLithosphere
comment: In geology, a supercontinent is a land mass comprising more than one continental core, or craton. The assembly of cratons and accreted terranes that form Eurasia qualifies as a supercontinent today.

ContinentalPlatform
type: Class
subclass of: GeologicProvince
comment: The extensive central cratons of continents may consist of both shields and platforms, and the crystalline basement. A platform is that part of the craton for which the basement is overlain by horizontal or subhorizontal sediments. [Wikipedia]

ContinentalRift
type: Class
subclass of: DivergentBoundary
subclass of: Rift
comment: A long, narrow fissure in the Earth marking a zone of the lithosphere that has become thinner due to extensional forces associated with plate teconics. Continental rifts are thousands of kilometers in length and hundreds of kilometers in width, and they are associated with normal faults and with grabens. [FreeDictionary]

Shield
type: Class
subclass of: GeologicProvince
comment: The extensive central cratons of continents may consist of both shields and platforms, and the crystalline basement. A shield is that part of a craton in which the usually Precambrian basement rocks crop out extensively at the surface. [Wikipedia]

ContinentalMargin
type: Class
subclass of: Margin
comment: The continental margin is the zone of the ocean floor that separates the thin oceanic crust from thick continental crust. [Wikipedia]