For general access to the Wolfram Knowledgebase, use entities of type GeologicalPeriod instead of GeologicalPeriodData.


gives the value of the specified property for the geological period entity.


gives a list of property values for the specified period name entities.


gives the specified annotation associated with the given property.


  • GeologicalPeriodData[] gives a list of all geological period entities.
  • GeologicalPeriodData["Properties"] gives a list of available properties.
  • The specified entity in GeologicalPeriodData can be an Entity, EntityClass, entity canonical name, or list thereof.
  • The specified property can be an EntityProperty, EntityPropertyClass, property canonical name, or list of properties.
  • GeologicalPeriodData["SampleEntities"] gives a list of sample entities.
  • Properties that do not apply or are not known in a particular case are indicated by Missing[].
  • Properties include:
  • "AssociatedRockLayer"associated rock layer
    "BiologicalEvents"biological events
    "CGMWColor"Commission for the Geological Map of the World color
    "ContinentalPlates"continental plates
    "DinosaurFamilies"dinosaur families
    "EndingEvent"ending event
    "HistoricalWorldMap"historical world map
    "LastPeriod"last period
    "MaximumBiodiversity"maximum biodiversity
    "MaximumOxygenLevels"maximum oxygen levels
    "MaximumSeaLevel"maximum sea level
    "MeanBiodiversity"mean biodiversity
    "MeanOxygenLevels"mean oxygen levels
    "MeanSeaLevel"mean sea level
    "MeteorCraters"meteor craters
    "MinimumBiodiversity"minimum biodiversity
    "MinimumOxygenLevels"minimum oxygen levels
    "MinimumSeaLevel"minimum sea level
    "NextPeriod"next period
    "ParentDivision"parent division
    "ParentEon"parent eon
    "ParentEra"parent era
    "ParentPeriod"parent period
    "StartingEvent"starting event
    "TimeRange"time range


open allclose all

Basic Examples  (3)

Determine the duration of a geological period:

Find the mean oxygen and sea level with respect to today:

Get an Association that specifies the periods that precede and follow the Triassic:

Neat Examples  (2)

Create a graph showing the connectivity of all geological periods:

Query for the polygons representing the continental plates during the Permian period:

Find out which polygon sets are available:

Create a map showing the arrangement of continental plates during the Permian period:

Introduced in 2014