G
- GeochronologicBoundary
- A boundary between two geochronologic time periods
- GeochronologicEra
- The association of an era with a stratotype is optional. In the GSSP approach recommended by ICS for the Global Geologic Timescale, Unit Stratotypes are not used.
Rather, the association of an Era with geologic units and sections is indirect, via the association of an era with Boundaries, which are in turn tied to Stratotype Points, which occur within host Stratotype Sections.
Note that the "German School" defines stratigraphic eras conceptually, without reference to stratotypes.
- GeochronologicEraRank
- This list is an indicative list only of terms used to describe the rank of time periods defined by the International Commission on Stratigraphy. Users are encouraged to use vocabulary of terms owned by the ICS or CGI vocabularies working group and managed outside of this model.
For example:
eon
era
period
epoch
age
- GeochronologicInterpretation
- An interpretation made by a geologist of the age of a specimen made by statistical analysis of a single collection of observations. A specimen may have multiple geochronological interpretations made on it, each related to a different observation collection.
- Geochronology
- The Dating package allows the delivery of interpretation of geochronological anaylytical data
- GeologicAge
- The GeoSciML GeologicAge package contains classes to support the description of geologic ages and events.
A geologic age is related to a particular GeologicEvent, during which one or more geological processes act to modify geological entities.
- GeologicDateEstimate
- An estimate of a point in geologic time and a link to its observational basis
- GeologicEvent
- An identifiable event during which one or more geological processes act to modify geological entities. A GeologicEvent must have a specified geologic age and may have specified environments and processes. An example might be a cratonic uplift event during which erosion, sedimentation, and volcanism all take place.
The numeric or named age attributes of a particular geological event are expressed in terms of years before present (absolute age), referred to the geological time scale, or by comparison with other geological events or features (relative named age). A geologic event age can represent an instant in time or an interval of time.
- GeologicFeature
- The GeoSciML GeologicFeature package contains the root Feature classes MappedFeature and GeologicFeature.
GeologicFeature represents a conceptual feature that is hypothesized to exist coherently in the world. Specializated geologic features are contained in other packages.
- GeologicFeatureRelation
- The GeologicFeatureRelation class is a concrete subtype of the abstract GeologicRelation class that is used to define relationships between geologic features, ie. structure-structure, unit-unit, and structure-unit relationships.
Relationships are always binary and directional. There is always a single source and a single target. The relationship is always defined from the perspective of the Source and is generally an active verb.
Example: a Source may point to an intrusive igneous rock body. In this case, the Target would point to the appropriate host rock body and the relationship attribute would be 'intrudes'. Other appropriate relationship attributes might include: overlies, offsets, crosscuts, folds, etc.
Two or more GeologicFeatures are associated in a GeologicFeatureRelation; each has a role in the relationship. Examples of geological roles include "overlies", "is overlain by", "is younger", "is older", "intrudes", "is intruded by", and so forth. In a relationship where an igneous unit intrudes a sedimentary unit, the geological relationship is "intrudes", the intruded sedimentary unit has the role "host", and the igneous unit has the role "intrusion".
- GeologicHistory
- Relates one or more GeologicEvents to a GeologicUnit or GeologicStructure to describe their age or geologic history.
- GeologicRelation
- The GeoSciML GeologicRelation package contains the root relation class.
Geologic Relations are typed, directed associations between geologic objects. Represents any of a wide variety of relationships that can exist between two or more Features or other entities. For example, the GeologicRelation "intrudes" is a relationship between an intrusive igneous rock and some host rock. Includes spatial, temporal, sequence, correlation, and parent/child relations.
- GeologicRelationshipTerm
- Refers to a vocabulary of terms describing a relationships between geologic features or objects
- GeologicSamplingMethod
- Implementation of SF_Process to describe the method used to obtain a geologic specimen
eg:
diamond drilling
percussion drilling
piston core drilling
vibro core drilling
channel sampling
sea floor dredging
geological hammer
- GeologicSamplingMethodTerm
- Refers to a vocabulary of terms describing the samplingProcess used to obtain or create the Specimen. eg:
diamond drilling
percussion drilling
piston core drilling
vibro core drilling
channel sampling
sea floor dredging
crushing
mineral separation
melting
geological hammer
- GeologicSpecimen
- The GeologicSpecimen package extends the ISO19156 O&M schema, and describes processes relevant to the sampling, preparation and analysis of geologic specimens.
- GeologicSpecimenPreparation
- An extension of OGC Specimen:PreparationStep to allow details of preparation steps to be delivered (eg, filtration and mesh size, chemical additives, crushing methods, drying parameters, etc)
- GeologicSpecimenPreparationTerm
- Refers to a vocabulary of terms to describe sample preparation applied to geologic specimens, typically in preparation for analytical processes like geochemistry or microscopy. eg:
crush
mineral separation
thin section
cut
polish
mount
acid digestion
- GeologicStructure
- GeologicStructures are a configuration of matter in the Earth based on describable inhomogeneity, pattern, or fracture in an Earth Material. The scale of geological structures ranges from microscopic (micron-scale) to megascopic (km-scale). Examples of such inhomogeneities include fractures, mineral grain boundaries, and boundaries between parts of the rock with different particle geometry (texture) or composition. Geologic structure is grounded in relationships between parts of a rock or rock body. As used here, it includes sedimentary structures. The identity of a Geologic Structure is independent of the material that is the substrate for the structure. There are almost always strong dependencies between the nature of the Earth Material substrate and the kinds of Geological Structure that may be present. A disaggregated heap of particles does not have structure, and can only be described in terms of the mineralogy and geometrical character of the constituent particles. Geologic Structures are more likely to be found in, and are more persistent in, consolidated materials than in unconsolidated materials. Properties like "clast-supported", "matrix-supported", and "graded bed" that do not involve orientation are considered kinds of Geologic Structure because they depend on the configuration of parts of a rock body.
- GeologicTimescale
- The Geologic Timescale package contains elements used to describe the classification of geologic time: time periods, time boundaries, and the relationships between them as defined by the International Commission on Stratigraphy.
- GeologicUnit
- The GeoSciML GeologicUnit Package contains classes representing notional geologic units, whose complete and precise extent is inferred to exist. Explicit spatial properties are available through association with a MappedFeature.
Geologic units includes both formal units (i.e. formally adopted and named in the official lexicon) and informal units (i.e. named but not promoted to the lexicon) and unnamed units (i.e. recognisable and described and delineable in the field but not otherwise formalised).
- GeologicUnitPart
- GeologicUnitPart associates a GeologicUnit with another GeologicUnit that is a proper part of that unit. Parts may be formal or notional. Formal parts refer to a specific body of rock, as in formal stratigraphic members. Notional parts refer to assemblages of particular EarthMaterials with particular internal structure, which may be repeated in various places within a unit (e.g. 'turbidite sequence', 'point bar assemblage', 'leucosome veins')
- GeologicUnitPartRoleTerm
- This class is a blank placeholder for a vocabulary of terms describing the nature of the parts of a geologic unit, e.g. facies, stratigraphic, interbeds, geographic, eastern facies,
- GeologicUnitTypeTerm
- This class is an indicative placeholder only for a vocabulary of terms describing the type of geologic unit. Users are encouraged to use the vocabulary of unit types provided by the CGI vocabularies working group.
Example values:
GeologicUnit
AllostratigraphicUnit
AlterationUnit
ArtificialGround
BiostratigraphicUnit
ChronostratigraphicUnit
DeformationUnit
ExcavationUnit
GeophysicalUnit
LithodemicUnit
LithogeneticUnit
LithologicUnit
LithostratigraphicUnit
LithotectonicUnit
MagnetostratigraphicUnit
MassMovementUnit
Pedoderm
PedostratigraphicUnit
PolarityChronostratigraphicUnit
- GeologicVocabulary
- A collection of terms (ControlledConcepts) and their associated definitions and relationships between the terms, usually organized in some logical fashion such as in a hierarchy (geologic time, rocks, unconsolidated deposits...). An instance of a GeologicConcept may occur only once in a particular GeologicVocabulary.
In GeoSciML this is normally identified using a URN in the "classifierScheme" branch of the CGI URN scheme, with the @codesSpace attribute set to "urn:ieft:rfc:2141".
- GeomorphologicFeature
- A feature describing the shape and nature of the Earth's land surface (ie, a landform). These landforms may be created by natural Earth processes (eg, river channel, beach, moraine, mountain) or through human (anthropogenic) activity (eg, dredged channel, reclaimed land, mine waste dumps).
- GeomorphologicRelation
- Use this association to relate a geomorphologic feature (ie, a landform) to a geologic unit which describes the surficial regolith materials which comprise or lie beneath the landform surface.
- Geomorphology
- The Geomorphology package describes features that comprise the shape and nature of the Earth's land surface (ie, landforms). These landforms may be created by natural Earth processes (eg, river channel, beach, moraine, mountain) or through human (anthropogenic) activity (eg, dredged channel, reclaimed land, mine waste dumps).
- GeoSciML
- GeoSciML v 3.0.0
GeoSciML is an application schema that specifies a set of feature-types and supporting structures for information used in the solid-earth geosciences.
GeoSciML is scoped approximately to the information required to construct geologic maps. "Map" is interpreted broadly, and not constrained to conventional 2-D semi-horizontal cartography, so the GeoSciML information structures also support representation of the distribution of geologic features on sections, along curvilinear-traverses and boreholes, and within volumetric samples, etc.
GeoSciML is primarily concerned with "interpreted" geology (units, structures, etc), but links to external schemas for the descriptions of observational data.
GeoSciML is factored into a set of sub-packages.
From v3.0 on the component packages are maintained separately.
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GeoSciML was developed under the auspices of the Interoperability Working Group https://www.seegrid.csiro.au/twiki/bin/view/CGIModel/InteroperabilityWG/ of the Commission for the Management and Application of Geoscience Information http://www.cgi-iugs.org/, a commission of the International Union of Geological Sciences http://www.iugs.org .
For the latest release, please see http://geosciml.org
Copyright (c) Commission for the Management and Application of Geoscience Information 2010. All rights reserved.
- GeoSciML-Core
- The GeoSciML-Core schema specifies a set of feature-types describing core geoscience information, including geologic units, structures, earth materials, relations between geologic features, and spatial geometries that represent geologic features on maps.
- GlobalStratotypePoint
- A type of stratigraphic point used to define a globally agreed point in geologic time
- GlobalStratotypeSection
- A type of stratigraphic section used to define a globally agreed standard period of geologic time
- GSML
- A collection container for items to be bundled in WFS response documents and other applications. FeatureType stereotype allows this to be a FeatureMember in a WFS_FeatureCollection.
- GSMLitem
- GSMLitem is a union class that specifies the types of features that are allowed to be members of the GSML class, and therefore, members of a GML Collection.
- GSSP
- The GSSP model describes "Global Boundary Stratotype Sections and Points" as defined by the International Stratigraphy Commission.