Pre-Illinoian glaciation (North America)

GPTKB entity

Predicate	Object
gptkbp:instanceOf	gptkb:lake
gptkbp:alsoKnownAs	gptkb:Pre-Illinoian_Stage
gptkbp:beganIn	about 2.4 million years ago
gptkbp:characterizedBy	multiple glacial advances
gptkbp:definedIn	glacial till sequences
gptkbp:endDate	about 0.5 million years ago
gptkbp:evidence	gptkb:Illinois gptkb:Iowa gptkb:Kansas gptkb:Midwestern_United_States gptkb:Minnesota gptkb:Nebraska gptkb:South_Dakota gptkb:Great_Plains
gptkbp:followedBy	gptkb:Illinoian_glaciation
https://www.w3.org/2000/01/rdf-schema#label	Pre-Illinoian glaciation (North America)
gptkbp:includes	gptkb:Aftonian_interglacial gptkb:Yarmouthian_interglacial gptkb:Kansan_glaciation gptkb:Nebraskan_glaciation
gptkbp:numberOfGlaciations	at least 11
gptkbp:occurredIn	gptkb:North_America
gptkbp:period	gptkb:Pleistocene_Epoch
gptkbp:precededBy	gptkb:Nebraskan_glaciation
gptkbp:redefined	1996
gptkbp:redefinedBy	gptkb:U.S._Geological_Survey
gptkbp:significance	oldest recognized glaciation in North America
gptkbp:bfsParent	gptkb:Günz_glaciation gptkb:Gunz_glaciation
gptkbp:bfsLayer	8