SWEET Ontology
type: Ontology
version info: 2.3
imports: matrRock.owl
imports: propSpace.owl
imports: relaSci.owl
imports: relaSpace.owl
imports: relaPhysical.owl
imports: rela.owl
imports: realm.owl

Core
type: Class
subclass of: GeosphereLayer
comment: The central most structure inside the earth. The core does not allow shear waves to pass through it, while the speed of travel (seismic velocity) is different in the other layers. [Wikipedia]

Crust
type: Class
subclass of: GeosphereLayer
subclass of: Restriction
  on property: hasLowerBoundary
  all values from: Moho
comment: The crust is the outermost solid shell of a rocky planet or moon, which is chemically distinct from the underlying mantle. [Wikipedia]

BrittleDuctileTransitionZone
type: Class
subclass of: Crust
comment: D" layer is the layer which separates the mantle from the core. D_ may consist of material from subducted slabs that descended and came to rest at the core-mantle boundary and/or from a new mineral polymorph discovered in perovskite called post-perovskite.[Wikipedia]

DLayer
type: Class
subclass of: Mantle
comment: D" layer is the layer which separates the mantle from the core. D_ may consist of material from subducted slabs that descended and came to rest at the core-mantle boundary and/or from a new mineral polymorph discovered in perovskite called post-perovskite.[Wikipedia]

GeologicFeature
type: Class
subclass of: PlanetaryRealm
subclass of: Restriction
  all values from: Geosphere
  on property: hasRealm
comment: or Surface Feature is a distinct recognizable structure within a larger context such as a stream bed, fissure, dike, etc.

GeologicProvince
type: Class
subclass of: GeologicFeature
comment: A geologic or geomorphic province is a spatial entity with common geologic/geomorphic attributes. A province may include a single dominant structural element such as a basin or a fold belt, or a number of contiguous related elements. Most commonly, provinces are classified by age, origin, or mineral resource. [Wikipedia]

InnerCore
type: Class
subclass of: Mantle
disjoint with: OuterCore
comment: The solid inner core was discovered in 1936 by Inge Lehmann and is generally believed to be composed primarily of iron and some nickel.[Wikipedia]

Lithosphere
type: Class
subclass of: GeosphereLayer
subclass of: Restriction
  on property: containsMaterial
  all values from: Rock
comment: In the Earth, the lithosphere includes the crust and the uppermost mantle, which constitute the hard and rigid outer layer of the planet. The division of Earth's outer layers into lithosphere and asthenosphere should not be confused with the chemical subdivision of the outer Earth into mantle, and crust. All crust is in the lithosphere, but lithosphere generally contains more mantle than crust. [Wikipedia]

LowerMantle
type: Class
subclass of: Mantle
comment: Very little is known about the lower mantle apart from that it appears to be relatively seismically homogeneous. The lower mantle is under tremendous pressure and therefore has a higher viscosity than the upper mantle.[Wikipedia]

Mantle
type: Class
subclass of: GeosphereLayer
subclass of: Restriction
  on property: hasUpperBoundary
  all values from: Moho
comment: The mantle is a highly viscous layer between the crust and the outer core. Earth's mantle is an approximately 2,970 km thick (~1,800 mi) rocky shell that constitutes approximately 84 percent of Earth's volume. [Wikipedia]

Mesosphere
type: Class
equivalent class: UpperMantleRigid
comment: The mesosphere refers to the mantle in the region between the asthenosphere and the outer core. The upper boundary is defined as the sharp increase in seismic wave velocities and density at a depth of 660 km. [Wikipedia]

OuterCore
type: Class
subclass of: Mantle
comment: The liquid outer core surrounds the inner core and is believed to be composed of iron mixed with nickel and trace amounts of lighter elements. [Wikipedia]

TransitionalCrust
type: Class
subclass of: Crust
comment: Transitional crust is crust that is thinned by the upwelling of mantle. [Wikipedia]

Asthenosphere
type: Class
subclass of: UpperMantle
equivalent class: UpperMantleFlowing
comment: The asthenosphere is a portion of the upper mantle just below the lithosphere. Seismic waves pass relatively slowly through the asthenosphere, compared to the overlying lithospheric mantle, thus it has been called the low-velocity zone. [Wikipedia]

UpperMantleRigid
type: Class
subclass of: UpperMantle
comment: The uppermost mantle plus overlying crust are relatively rigid and form the lithosphere, an irregular layer with a maximum thickness of perhaps 200 km. [Wikipedia]

UpperMantle
type: Class
subclass of: Mantle
comment: The mantle is divided into sections based upon results from seismology. The upper mantle is the region from 33–410 km (20 to 254 miles). The upper part of the mantle is composed mostly of peridotite, a rock denser than rocks common in the overlying crust. [Wikipedia]

Batholith
type: Class
subclass of: PlutonicStructure
comment: A batholith is a large emplacement of igneous intrusive (also called plutonic) rock that forms from cooled magma deep in the Earth's crust. Batholiths are almost always made mostly of felsic or intermediate rock-types, such as granite, quartz monzonite, or diorite (see also granite dome).There is also an important geographic usage of the term batholith. For a geographer, a batholith is an exposed area of mostly continuous plutonic rock that covers an area larger than 100 square kilometers. [Wikipedia]

Dike
type: Class
subclass of: PlutonicStructure
comment: Dikes, long, planar (sheet) igneous intrusions, enter along cracks, and therefore often form in large numbers in areas that are being actively deformed. [Wikipedia]

GiantDikeSwarm
type: Class
subclass of: Dike
comment: A dike swarm or dyke swarm in geology is a major group of parallel, linear, or radially oriented dikes intruded within continental crust. [Wikipedia]

Laccolith
type: Class
subclass of: PlutonicStructure
comment: [Pluton] Igneous intrusion - A laccolith is an igneous intrusion (or concordant pluton) that has been injected between two layers of sedimentary rock. The pressure of the magma is high enough that the overlying strata are forced upward, giving the laccolith a dome or mushroom-like form with a generally planar base.Laccoliths tend to form at relatively shallow depths and are typically formed by relatively viscous magmas, such as those that crystallize to diorite, granodiorite, and granite.[Wikipedia]

Lopolith
type: Class
subclass of: PlutonicStructure
comment: [Pluton] Igneous intrusion - A lopolith is a large igneous intrusion which is lenticular in shape with a depressed central region. Lopoliths are generally concordant with the intruded strata with dike or funnel-shaped feeder bodies below the body. Lopoliths typically consist of large ultramafic to mafic layered intrusions that range in age from Archean to Eocene. [Wikipedia]

Sill
type: Class
subclass of: PlutonicStructure
comment: [Pluton] Igneous intrusion - A sill is a tabular pluton that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or even along the direction of foliation in metamorphic rock. The term sill is synonymous with concordant intrusive sheet. This means that the sill does not cut across preexisting rocks, in contrast to dikes, which do cut across older rocks. [Wikipedia]

SeismicZone
type: Class
subclass of: GeologicFeature
comment: Seismic Zones are broad elongated regions along a fault line where earthquakes take place. [Wikipedia]

GuttenburgDiscontinuity
type: Class
subclass of: GeologicBoundary
equivalent class: CoreMantleBoundary
comment: The core-mantle boundary. This discontinuity is due to the differences between the acoustic impedances of the solid mantle and the molten outer core. P-wave velocities are much slower in the outer core than in the deep mantle while S-waves do not exist at all in the liquid portion of the core. Corresponds to top of D"". [Wikipedia]

LehmannDiscontinuity
type: Class
subclass of: GeologicBoundary
comment: Boundary between Asthenosphere and Lithosphere. It is the discontinuity in seismic velocity near a depth of 220 km. It appears beneath continents, but not usually beneath oceans, and does not readily appear in globally-averaged studies [Wikipedia]

Moho
type: Class
subclass of: GeologicBoundary
equivalent class: Mohorovi i Discontinuity
equivalent class: CrustMantleBoundary
comment: The boundary between the crust and mantle is conventionally placed at the Mohorovi_i_ discontinuity, a boundary defined by a contrast in seismic velocity. [Wikipedia]