Ontario Island

Short description: Former glacial landform in Ontario

Ontario Island was a glacial feature as lobes of the Laurentide Glaciation receded from southern Ontario.[1][2] The glaciation started to retreat approximately 20,000 years ago. As it retreated its southern edge was ringed by a series of proglacial lakes. The relatively high ground, west of the Niagara Escarpment formed a large island in these lakes.

## References

1. ↑ Peter L. Storck (2011). Journey to the Ice Age: Discovering an Ancient World. UBC Press. ISBN 9780774841276. https://books.google.com/books?id=UYb7yYHLFZIC&pg=PA60&lpg=PA60&dq=glacial+"ontario+island"#q=glacial "ontario island". "The first part of Ontario to become ice free was the high ground west of the Niagara Escarpment in south-central Ontario, a region geologists call Ontario Island."
2. ↑ "Elora and Fergus Geology". University of Waterloo. https://uwaterloo.ca/wat-on-earth/news/elora-and-fergus-geology. Retrieved 2023-09-07. "The higher ground to the north of here, sometimes referred to as “Ontario Island,” because it was surrounded by shrinking ice lobes and growing glacial lakes, tended to deglaciate first."

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