Global Standard Stratigraphic Age (GSSA)
E803994
The Global Standard Stratigraphic Age (GSSA) is a chronostratigraphic reference point used to define the absolute age boundaries of early Precambrian time intervals in the geologic time scale.
Observed surface forms (2)
| Surface form | Occurrences |
|---|---|
| Global Standard Stratigraphic Age | 1 |
| Geologic Time Scale | 1 |
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
chronostratigraphic reference point
ⓘ
geologic time scale standard ⓘ stratigraphic boundary definition ⓘ |
| abbreviation | GSSA ⓘ |
| abbreviationOfContrastedConcept | GSSP NERFINISHED ⓘ |
| appliesTo |
Archean eon
ⓘ
Precambrian NERFINISHED ⓘ Proterozoic eon NERFINISHED ⓘ |
| appliesWhen | no suitable stratotype section is available ⓘ |
| associatedWith | radiometric time scale ⓘ |
| basisOfBoundaryDefinition | absolute numerical age rather than rock section ⓘ |
| category |
geochronology standard
ⓘ
stratigraphic nomenclature element ⓘ |
| characteristic |
defined in terms of absolute age in millions of years
ⓘ
not tied to a specific stratotype section ⓘ |
| contrastedWith | Global Boundary Stratotype Section and Point NERFINISHED ⓘ |
| definedBy |
numerical age
ⓘ
radiometric dating ⓘ |
| defines | absolute age boundaries of early Precambrian time intervals ⓘ |
| definesBoundaryType | chronometric boundary ⓘ |
| distinguishedFrom | biostratigraphic marker-based boundaries ⓘ |
| governedBy | International Commission on Stratigraphy NERFINISHED ⓘ |
| hasComponent |
assigned chronostratigraphic boundary
ⓘ
specified numerical age in Ma (millions of years) ⓘ |
| hasOpposedConcept | stratotype-based boundary ⓘ |
| hasTemporalResolution | million-year scale ⓘ |
| language | English ⓘ |
| notTypicallyAppliedTo | Phanerozoic eon NERFINISHED ⓘ |
| purpose |
provide fixed numerical ages for chronostratigraphic units
ⓘ
standardize early Precambrian time boundaries globally ⓘ |
| reasonForUse | scarcity of continuous, correlatable Precambrian stratigraphic sections ⓘ |
| relatedConcept |
Precambrian time subdivision
ⓘ
geologic time scale calibration ⓘ |
| relatedTo | International Union of Geological Sciences NERFINISHED ⓘ |
| scope | global ⓘ |
| standardType | numerical age standard ⓘ |
| timeScalePosition | earliest part of Earth history ⓘ |
| usedBy |
geochronologists
ⓘ
geologists ⓘ stratigraphers ⓘ |
| usedFor |
construction of international geologic time charts
ⓘ
correlation of Precambrian rock units ⓘ |
| usedIn |
chronostratigraphy
ⓘ
geologic time scale ⓘ |
| usedToDefine |
boundaries of Precambrian eons
ⓘ
boundaries of Precambrian eras ⓘ boundaries of Precambrian periods ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
Lemme-Carrosio section, Italy (Miocene GSSP)
→
belongsToTimeScale
→
Global Standard Stratigraphic Age (GSSA)
ⓘ
subject surface form:
Lemme-Carrosio section
this entity surface form:
Geologic Time Scale
Global Boundary Stratotype Section and Point
→
relatedConcept
→
Global Standard Stratigraphic Age (GSSA)
ⓘ
this entity surface form:
Global Standard Stratigraphic Age