Geologic Timescale model

Geochronologic era of rank 'Age'

isc:Calabrian
  rdf:type gts:Age ;
  rdf:type gts:GeochronologicEra ;
  rdf:type skos:Concept ;
  rdf:type time:ProperInterval ;
  gts:rank rank:Age ;
  rdfs:comment "older bound -1.80 Ma"@en ;
  rdfs:comment "younger bound -0.781 Ma"@en ;
  schema:name "Calabrian Age"@en ;
  skos:notation "a1.1.1.1.2.3"^^gts:EraCode ;
  skos:prefLabel "Calabr"@cs ;
  skos:prefLabel "Calabrian"@en ;
  time:hasBeginning isc:BaseCalabrian ;
  time:hasEnd isc:BaseMiddlePleistocene ;
  time:intervalDuring isc:Pleistocene ;
  time:intervalIn isc:Pleistocene ;
  time:intervalMeets isc:MiddlePleistocene ;
  time:intervalMetBy isc:Gelasian ;
.

• Geochronologic era rank ^op value Age ^c
  
• time:intervalIn exactly 1 Epoch ^c
  
• time:intervalContains exactly 0 Epoch ^c or Age ^c or Sub-Period ^c or Period ^c or Era ^c or Eon ^c or Super-Eon ^c
  
• time:intervalFinishedBy exactly 0 Epoch ^c or Age ^c or Sub-Period ^c or Period ^c or Era ^c or Eon ^c or Super-Eon ^c
  
• time:intervalStartedBy exactly 0 Epoch ^c or Age ^c or Sub-Period ^c or Period ^c or Era ^c or Eon ^c or Super-Eon ^c
  

Geochronologic era of rank 'Eon'

isc:Proterozoic
  rdf:type gts:Eon ;
  rdf:type gts:GeochronologicEra ;
  rdf:type skos:Concept ;
  rdf:type time:ProperInterval ;
  gts:rank rank:Eon ;
  rdfs:comment "older bound -2500 Ma"@en ;
  rdfs:comment "younger bound -541.0 +|-1.0 Ma"@en ;
  schema:name "Proterozoic Eon"@en ;
  skos:notation "a2.1"^^gts:EraCode ;
  skos:prefLabel "Proterosoikum"@et ;
  skos:prefLabel "Proterozoic"@en ;
  time:hasBeginning isc:BaseProterozoic ;
  time:hasEnd isc:BasePhanerozoic ;
  time:intervalContains isc:Mesoproterozoic ;
  time:intervalFinishedBy isc:Neoproterozoic ;
  time:intervalFinishes isc:Precambrian ;
  time:intervalIn isc:Precambrian ;
  time:intervalMeets isc:Cambrian ;
  time:intervalMeets isc:Fortunian ;
  time:intervalMeets isc:Paleozoic ;
  time:intervalMeets isc:Phanerozoic ;
  time:intervalMeets isc:Terreneuvian ;
  time:intervalMetBy isc:Archean ;
  time:intervalMetBy isc:Neoarchean ;
  time:intervalStartedBy isc:Paleoproterozoic ;
.

• Geochronologic era rank ^op value Eon ^c
  
• time:intervalIn max 1 Super-Eon ^c
  
• time:intervalFinishedBy exactly 1 Era ^c
  
• time:intervalStartedBy exactly 1 Era ^c
  
• time:intervalContains exactly 0 Eon ^c or Super-Eon ^c
  
• time:intervalFinishedBy exactly 0 Eon ^c or Super-Eon ^c
  
• time:intervalStartedBy exactly 0 Eon ^c or Super-Eon ^c
  
• time:intervalContains some Era ^c
  

Geochronologic era of rank 'Epoch'

isc:Cisuralian
  rdf:type gts:Epoch ;
  rdf:type gts:GeochronologicEra ;
  rdf:type skos:Concept ;
  rdf:type time:ProperInterval ;
  gts:rank rank:Epoch ;
  rdfs:comment "older bound -298.9 +|-0.15 Ma"@en ;
  rdfs:comment "younger bound -272.95 +|-0.11 Ma"@en ;
  schema:name "Cisuralian Epoch"@en ;
  skos:notation "a1.1.3.1.3"^^gts:EraCode ;
  skos:prefLabel "Cisural"@cs ;
  skos:prefLabel "Cisuralian"@en ;
  skos:prefLabel "Kisuralis"@lt ;
  time:hasBeginning isc:BasePermian ;
  time:hasEnd isc:BaseGuadalupian ;
  time:intervalContains isc:Artinskian ;
  time:intervalContains isc:Sakmarian ;
  time:intervalFinishedBy isc:Kungurian ;
  time:intervalIn isc:Permian ;
  time:intervalMeets isc:Guadalupian ;
  time:intervalMeets isc:Roadian ;
  time:intervalMetBy isc:Carboniferous ;
  time:intervalMetBy isc:Gzhelian ;
  time:intervalMetBy isc:Pennsylvanian ;
  time:intervalMetBy isc:UpperMississippian ;
  time:intervalMetBy isc:UpperPennsylvanian ;
  time:intervalStartedBy isc:Asselian ;
  time:intervalStarts isc:Permian ;
.

• Geochronologic era rank ^op value Epoch ^c
  
• time:intervalFinishedBy exactly 1 Age ^c
  
• time:intervalStartedBy exactly 1 Age ^c
  
• time:intervalContains exactly 0 Eon ^c or Era ^c or Epoch ^c or Period ^c or Sub-Period ^c or Super-Eon ^c
  
• time:intervalFinishedBy exactly 0 Eon ^c or Era ^c or Epoch ^c or Period ^c or Sub-Period ^c or Super-Eon ^c
  
• time:intervalStartedBy exactly 0 Eon ^c or Era ^c or Epoch ^c or Period ^c or Sub-Period ^c or Super-Eon ^c
  
• time:intervalIn exactly 1 Period ^c or Sub-Period ^c
  
• time:intervalContains some Age ^c
  

Geochronologic era of rank 'Era'

isc:Mesoproterozoic
  rdf:type gts:Era ;
  rdf:type gts:GeochronologicEra ;
  rdf:type skos:Concept ;
  rdf:type time:ProperInterval ;
  gts:rank rank:Era ;
  rdfs:comment "older bound -1600 Ma"@en ;
  rdfs:comment "younger bound -1000 Ma"@en ;
  schema:name "Mesoproterozoic Era"@en ;
  skos:notation "a2.1.2"^^gts:EraCode ;
  skos:prefLabel "Mesoproterozoic"@en ;
  skos:prefLabel "Mesoproterozoico"@es ;
  time:hasBeginning isc:BaseMesoproterozoic ;
  time:hasEnd isc:BaseNeoproterozoic ;
  time:intervalContains isc:Ectasian ;
  time:intervalDuring isc:Proterozoic ;
  time:intervalFinishedBy isc:Stenian ;
  time:intervalIn isc:Proterozoic ;
  time:intervalMeets isc:Neoproterozoic ;
  time:intervalMeets isc:Tonian ;
  time:intervalMetBy isc:Paleoproterozoic ;
  time:intervalMetBy isc:Statherian ;
  time:intervalStartedBy isc:Calymmian ;
.

• Geochronologic era rank ^op value Era ^c
  
• time:intervalIn exactly 1 Eon ^c
  
• time:intervalFinishedBy exactly 1 Period ^c
  
• time:intervalStartedBy exactly 1 Period ^c
  
• time:intervalContains exactly 0 Super-Eon ^c or Eon ^c or Era ^c
  
• time:intervalFinishedBy exactly 0 Super-Eon ^c or Eon ^c or Era ^c
  
• time:intervalStartedBy exactly 0 Super-Eon ^c or Eon ^c or Era ^c
  
• time:intervalContains some Period ^c
  

Boundary between geochronologic eras, defined with reference to an agreed stratigraphic point. Typically denoted as the 'base of' the succeeding era

isc:BaseJurassic
  rdf:type gts:GeochronologicBoundary ;
  rdf:type thors:EraBoundary ;
  rdf:type skos:Concept ;
  rdf:type time:Instant ;
  gts:stratotype isc:BaseJurassicSP ;
  schema:name "Base of Jurassic"@en ;
  skos:altLabel "Base of Hettangian"@en ;
  skos:altLabel "Base of Lower Jurassic"@en ;
  skos:prefLabel "Base of Jurassic"@en ;
  time:inTemporalPosition isc:BaseJurassicTime ;
.

Named interval within the geologic timescale, of any rank

isc:Mesozoic
  rdf:type gts:Era ;
  rdf:type gts:GeochronologicEra ;
  rdf:type skos:Concept ;
  rdf:type time:ProperInterval ;
  schema:name "Mesozoic Era"@en ;
  skos:notation "a1.1.2"^^gts:EraCode ;
  skos:prefLabel "Mesosoikum"@et ;
  skos:prefLabel "Mesozoic"@en ;
  time:hasBeginning isc:BaseMesozoic ;
  time:hasEnd isc:BaseCenozoic ;
.

• stratotype ^op only Stratigraphic Section ^c
  
• Geochronologic era rank ^op exactly 1
  
• notation ^dp some Era code ^c
  

• Age ^c
• Eon ^c
• Epoch ^c
• Era ^c
• Period ^c
• Sub-Period ^c
• Super-Eon ^c

The hierarchical ordinal/nominal reference system known as the Geologic Timescale

ts:gts2019
  rdf:type gts:GeologicTimescale ;
  rdf:type skos:ConceptScheme ;
  rdf:type time:TRS ;
  thors:component isc:Phanerozoic ;
  thors:component isc:Precambrian ;
  thors:referencePoint isc:BasePhanerozoic ;
  thors:referencePoint isc:FormationOfEarth ;
  thors:referencePoint isc:Present ;
  schema:name "Geologic Time Scale (2019)"@en ;
.

• thors:component only Geochronologic Era ^c
  
• thors:referencePoint only na9a607c553f344eb89b8725163c5f64db108 ^c
  

Boundary between geochronologic eras, defined by an agreed chronometric position (i.e. numeric age). Typically denoted as the 'base of' the succeeding era

isc:BaseProterozoic
  rdf:type gts:NumericEraBoundary ;
  rdf:type thors:EraBoundary ;
  rdf:type skos:Concept ;
  rdf:type time:Instant ;
  gts:ratifiedGSSP true ;
  schema:name "Base of Proterozoic"@en ;
  skos:prefLabel "Base of Proterozoic"@en ;
  time:inTemporalPosition isc:BaseProterozoicTime ;
.

Geochronologic era of rank 'Period'

isc:Stenian
  rdf:type gts:GeochronologicEra ;
  rdf:type gts:Period ;
  rdf:type skos:Concept ;
  rdf:type time:ProperInterval ;
  gts:rank rank:Period ;
  rdfs:comment "older bound -1200 Ma"@en ;
  rdfs:comment "younger bound -1000 Ma"@en ;
  schema:name "Stenian Period"@en ;
  skos:notation "a2.1.2.1"^^gts:EraCode ;
  skos:prefLabel "Esteniense"@es ;
  skos:prefLabel "Stenian"@en ;
  time:hasBeginning isc:BaseStenian ;
  time:hasEnd isc:BaseNeoproterozoic ;
  time:intervalFinishes isc:Mesoproterozoic ;
  time:intervalIn isc:Mesoproterozoic ;
  time:intervalMeets isc:Neoproterozoic ;
  time:intervalMeets isc:Tonian ;
  time:intervalMetBy isc:Ectasian ;
.

• Geochronologic era rank ^op value Period ^c
  
• time:intervalFinishedBy exactly 1 Epoch ^c
  
• time:intervalStartedBy exactly 1 Epoch ^c
  
• time:intervalIn exactly 1 Era ^c
  
• time:intervalContains exactly 0 Super-Eon ^c or Eon ^c or Era ^c or Period ^c
  
• time:intervalFinishedBy exactly 0 Super-Eon ^c or Eon ^c or Era ^c or Period ^c
  
• time:intervalStartedBy exactly 0 Super-Eon ^c or Eon ^c or Era ^c or Period ^c
  
• time:intervalContains some Epoch ^c
  

• A subclass of Geologic Event (placeholder)

• Geologic event correlated with a specified stratotype.

A specified position within an agreed stratigraphic section, used to calibrate the temporal position (age) of a boundary within the geologic timescale.

isc:BaseJurassicSP
  rdf:type gts:StratigraphicPoint ;
  dct:source "Episodes 36/3, p. 162-198, 2013"@en ;
  gts:boundaryLevel "5.80 m above top of Koessen Formation"@en ;
  gts:correlationEvent "FO of ammonite Psiloceras spelae tirolicum, FO of aragonitic foraminifer Praegubkinella turgescens"@en ;
  gts:ratifiedGSSP true ;
  gts:status "Ratified 2010"@en ;
  geo:hasGeometry isc:BaseJurassic-location ;
  rdfs:comment "Kuhjoch section,Tyrol, Austria "@en ;
  schema:name "Stratotype Point Base of Jurassic"@en ;
  rdfs:seeAlso <http://www.stratigraphy.org/GSSP/Hettangian.pdf> ;
  rdfs:seeAlso <http://www.stratigraphy.org/GSSP/index.html> ;
  skos:prefLabel "Stratotype Point Base of Jurassic"@en ;
.

• boundary level ^dp
• correlation event ^dp
• geochronologic boundary ^op

• correlation event ^dp exactly 1
  
• status ^dp exactly 1
  
• ratified ^dp max 1
  

An agreed stratigraphic section, which hosts a stratigraphic point that is used to calibrate the temporal position (age) of a boundary within the geologic timescale.

• geologic description ^dp
• geologic setting ^dp
• geochronologic era ^op

• geologic description ^dp exactly 1
  
• geologic setting ^dp exactly 1
  

Geochronologic era of rank 'Sub-Period'

isc:Mississippian
  rdf:type gts:GeochronologicEra ;
  rdf:type gts:Sub-Period ;
  rdf:type skos:Concept ;
  rdf:type time:ProperInterval ;
  gts:rank rank:Sub-Period ;
  rdfs:comment "older bound -358.9 +|-0.4 Ma"@en ;
  rdfs:comment "younger bound -323.2 +|-0.4 Ma"@en ;
  schema:name "Mississippian Sub-period"@en ;
  skos:notation "a1.1.3.2.2"^^gts:EraCode ;
  skos:prefLabel "Misisipis"@lt ;
  skos:prefLabel "Mississippian"@en ;
  time:hasBeginning isc:BaseCarboniferous ;
  time:hasEnd isc:BasePennsylvanian ;
  time:intervalContains isc:MiddleMississippian ;
  time:intervalFinishedBy isc:UpperMississippian ;
  time:intervalIn isc:Carboniferous ;
  time:intervalMeets isc:Bashkirian ;
  time:intervalMeets isc:LowerPennsylvanian ;
  time:intervalMeets isc:Pennsylvanian ;
  time:intervalMetBy isc:Devonian ;
  time:intervalMetBy isc:Famennian ;
  time:intervalMetBy isc:UpperDevonian ;
  time:intervalStartedBy isc:LowerMississippian ;
  time:intervalStarts isc:Carboniferous ;
.

• Geochronologic era rank ^op value Sub-Period ^c
  
• time:intervalFinishedBy exactly 1 Epoch ^c
  
• time:intervalStartedBy exactly 1 Epoch ^c
  
• time:intervalIn exactly 1 Period ^c
  
• time:intervalContains exactly 0 Super-Eon ^c or Eon ^c or Era ^c or Period ^c or Sub-Period ^c
  
• time:intervalFinishedBy exactly 0 Super-Eon ^c or Eon ^c or Era ^c or Period ^c or Sub-Period ^c
  
• time:intervalStartedBy exactly 0 Super-Eon ^c or Eon ^c or Era ^c or Period ^c or Sub-Period ^c
  
• time:intervalContains some Epoch ^c
  

Geochronologic era of rank 'Super-Eon'

isc:Precambrian
  rdf:type gts:GeochronologicEra ;
  rdf:type gts:Super-Eon ;
  rdf:type skos:Concept ;
  rdf:type time:ProperInterval ;
  gts:rank rank:Super-Eon ;
  rdfs:comment "older bound -4567 +|-1 Ma"@en ;
  rdfs:comment "younger bound -541.0 +|-1.0 Ma"@en ;
  schema:name "Precambrian Supereon"@en ;
  skos:notation "a2"^^gts:EraCode ;
  skos:prefLabel "Precambrian"@en ;
  skos:prefLabel "Précambrien"@fr ;
  time:hasBeginning isc:FormationOfEarth ;
  time:hasEnd isc:BasePhanerozoic ;
  time:intervalContains isc:Archean ;
  time:intervalFinishedBy isc:Proterozoic ;
  time:intervalMeets isc:Cambrian ;
  time:intervalMeets isc:Fortunian ;
  time:intervalMeets isc:Paleozoic ;
  time:intervalMeets isc:Phanerozoic ;
  time:intervalMeets isc:Terreneuvian ;
  time:intervalStartedBy isc:Hadean ;
.

• time:intervalFinishedBy exactly 1 Eon ^c
  
• time:intervalStartedBy exactly 1 Eon ^c
  
• time:intervalContains exactly 0 Super-Eon ^c
  
• time:intervalFinishedBy exactly 0 Super-Eon ^c
  
• time:intervalStartedBy exactly 0 Super-Eon ^c
  
• time:intervalContains some Eon ^c
  

Rank of geologic era within the standard hierarchy: Eon, Era, Period, Epoch, Age

rank:Period
  rdf:type gts:GeochronologicEraRank ;
  rdf:type skos:Concept ;
  schema:name "Period" ;
.

stratigraphic event corresponding with this boundary or point

Uncertainty in a time position

isc:BaseAeronianTime
  a time:TimePosition ;
  gts:positionalUncertainty isc:BaseAeronianUncertainty ;
  time:hasTRS <http://resource.geosciml.org/classifier/cgi/geologicage/ma> ;
  time:numericPosition 440.8 ;
.

Elements of all ranks are included in the class 'gts:GeochronologicEra'. The rank may be indicated by membership of a sub-class, or is indicated using the 'gts:rank' property.

isc:Aalenian
  a gts:Age ;
  a gts:GeochronologicEra ;
  a skos:Concept ;
  a time:ProperInterval ;
  gts:rank rank:Age ;
.

geochronologic boundary corresponding with this stratigraphic point

geochronologic era corresponding with this stratigraphic section

the characteristic stratigraphic point or section corresponding with a geochronologic concept

isc:BaseAeronian
  a gts:GeochronologicBoundary ;
  a thors:EraBoundary ;
  a skos:Concept ;
  a time:Instant ;
  gts:stratotype isc:BaseAeronianSP ;
  schema:name "Base of Aeronian"@en ;
  skos:prefLabel "Base of Aeronian"@en ;
  time:inTemporalPosition isc:BaseAeronianTime ;
.

the level within the section of the point characterizing the boundary

isc:BaseBathonianSP
  a gts:StratigraphicPoint ;
  gts:boundaryLevel "Base of limestone bed RB07 "@en ;
  gts:correlationEvent "Ammonite FAD Gonolkite convergens (defines Base of Zigzagiceras zigzag Zone)"@en ;
  gts:ratifiedGSSP true ;
  gts:status "Ratified 2008"@en ;
  geo:hasGeometry isc:BaseBathonian-location ;
  rdfs:comment "Ravin du Bes, Bas Auran area, Alpes de Haute Provence, France  "@en ;
  schema:name "Stratotype Point Base of Bathonian"@en ;
.

the stratigraphic event that is intended to be represented by this stratigraphic point

isc:BaseBathonianSP
  a gts:StratigraphicPoint ;
  gts:boundaryLevel "Base of limestone bed RB07 "@en ;
  gts:correlationEvent "Ammonite FAD Gonolkite convergens (defines Base of Zigzagiceras zigzag Zone)"@en ;
  gts:ratifiedGSSP true ;
  gts:status "Ratified 2008"@en ;
  geo:hasGeometry isc:BaseBathonian-location ;
  rdfs:comment "Ravin du Bes, Bas Auran area, Alpes de Haute Provence, France  "@en ;
  schema:name "Stratotype Point Base of Bathonian"@en ;
.

geologic description of the stratigraphic section

geologic setting of the stratigraphic section

flag to indicate the status of the calibration details of a geochronologic boundary - 'true' if ratified by ICS

isc:BaseBathonianSP
  a gts:StratigraphicPoint ;
  gts:boundaryLevel "Base of limestone bed RB07 "@en ;
  gts:correlationEvent "Ammonite FAD Gonolkite convergens (defines Base of Zigzagiceras zigzag Zone)"@en ;
  gts:ratifiedGSSP true ;
  gts:status "Ratified 2008"@en ;
  geo:hasGeometry isc:BaseBathonian-location ;
  rdfs:comment "Ravin du Bes, Bas Auran area, Alpes de Haute Provence, France  "@en ;
  schema:name "Stratotype Point Base of Bathonian"@en ;
.

• formal ICS status of this boundary and point

• Description of the formal ICS status of this boundary and point

isc:BaseBathonianSP
  a gts:StratigraphicPoint ;
  gts:boundaryLevel "Base of limestone bed RB07 "@en ;
  gts:correlationEvent "Ammonite FAD Gonolkite convergens (defines Base of Zigzagiceras zigzag Zone)"@en ;
  gts:ratifiedGSSP true ;
  gts:status "Ratified 2008"@en ;
  geo:hasGeometry isc:BaseBathonian-location ;
  rdfs:comment "Ravin du Bes, Bas Auran area, Alpes de Haute Provence, France  "@en ;
  schema:name "Stratotype Point Base of Bathonian"@en ;
.

isc:Calabrian  skos:notation "a1.1.1.1.2.3"^^gts:EraCode .