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.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Geologic Time Scale | 1 |
| Global Standard Stratigraphic Age | 1 |
| Global Standard Stratigraphic Age (GSSA) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9523003 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Global Standard Stratigraphic Age (GSSA) Context triple: [Statherian Period, definedBy, Global Standard Stratigraphic Age (GSSA)]
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A.
Global Boundary Stratotype Section and Point
The Global Boundary Stratotype Section and Point (GSSP) is an internationally agreed reference point in a specific rock sequence that precisely defines the lower boundary of a stage or age in the geologic time scale.
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B.
International Chronostratigraphic Chart
The International Chronostratigraphic Chart is the globally recognized standard timeline used by geologists to define and correlate the divisions of Earth’s geological history.
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C.
Global Boundary Stratotype Section and Point for the base of the Anisian
The Global Boundary Stratotype Section and Point for the base of the Anisian is the internationally agreed geological reference point that marks the beginning of the Anisian Stage and thus the formal onset of the Middle Triassic.
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D.
Global Boundary Stratotype Section and Point for base of Hettangian
The Global Boundary Stratotype Section and Point for the base of the Hettangian is the internationally agreed geological reference point that marks the formal beginning of the Jurassic Period and the Mesozoic era’s post-Triassic recovery interval.
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E.
Global Boundary Stratotype Section and Point at Klonk, Czech Republic
The Global Boundary Stratotype Section and Point at Klonk in the Czech Republic is a formally designated geological reference site that marks the internationally agreed base of the Devonian System and serves as a key standard for correlating Early Devonian rock strata worldwide.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Global Standard Stratigraphic Age (GSSA) Target entity description: 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.
-
A.
Global Boundary Stratotype Section and Point
The Global Boundary Stratotype Section and Point (GSSP) is an internationally agreed reference point in a specific rock sequence that precisely defines the lower boundary of a stage or age in the geologic time scale.
-
B.
International Chronostratigraphic Chart
The International Chronostratigraphic Chart is the globally recognized standard timeline used by geologists to define and correlate the divisions of Earth’s geological history.
-
C.
Global Boundary Stratotype Section and Point for the base of the Anisian
The Global Boundary Stratotype Section and Point for the base of the Anisian is the internationally agreed geological reference point that marks the beginning of the Anisian Stage and thus the formal onset of the Middle Triassic.
-
D.
Global Boundary Stratotype Section and Point for base of Hettangian
The Global Boundary Stratotype Section and Point for the base of the Hettangian is the internationally agreed geological reference point that marks the formal beginning of the Jurassic Period and the Mesozoic era’s post-Triassic recovery interval.
-
E.
Global Boundary Stratotype Section and Point at Klonk, Czech Republic
The Global Boundary Stratotype Section and Point at Klonk in the Czech Republic is a formally designated geological reference site that marks the internationally agreed base of the Devonian System and serves as a key standard for correlating Early Devonian rock strata worldwide.
- F. None of above. chosen
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 ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Global Standard Stratigraphic Age (GSSA) Description of subject: 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.
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