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gptkbp:instanceOf
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gptkb:Geological_period
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gptkbp:alsoKnownAs
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gptkb:Glacial_period
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gptkbp:beganIn
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About 2.58 million years ago
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gptkbp:causedBy
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Plate tectonics
Atmospheric composition changes
Changes in Earth's orbit
Ocean circulation changes
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gptkbp:characterizedBy
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Expansion of continental and polar ice sheets
Long-term reduction in Earth's temperature
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gptkbp:currentInterglacial
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Holocene
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gptkbp:effect
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Expansion of glaciers
Extinction of some species
Migration of species
Sea level drop
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gptkbp:includes
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Glacial periods
Interglacial periods
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gptkbp:lastGlacialMaximum
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About 20,000 years ago
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gptkbp:lastMajorIceAge
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gptkb:Quaternary_glaciation
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gptkbp:notableIceAges
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gptkb:Huronian_glaciation
gptkb:Quaternary_glaciation
Andean-Saharan glaciation
Cryogenian glaciation
Karoo Ice Age
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gptkbp:relatedTo
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gptkb:Greenhouse_gases
gptkb:Holocene_epoch
gptkb:Pleistocene_epoch
gptkb:Snowball_Earth
gptkb:Milankovitch_cycles
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gptkbp:studiedBy
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Glaciology
Paleoclimatology
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gptkbp:bfsParent
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gptkb:Ice_Ages,_Recent_and_Ancient
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gptkbp:bfsLayer
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7
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https://www.w3.org/2000/01/rdf-schema#label
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Ice age
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