Glacial Terraces

Glacial Terraces (HM216F)

Location: Terrace Bay, Ontario P0T Thunder Bay District
Country: Canada
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N 48° 46.888', W 87° 6.152'

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About 20,000 years ago Ontario was covered by a great glacier, the fourth glaciation in this region within the past million years. The meltwaters from these gigantic ice-sheets filled the Lake Superior basin and progressively developed new drainage patterns which gradually lowered the level of the lake. As the waters receded from old shorelines more recent lake deposits where exposed and new shorelines established. This process produced a succession of terraces, separated from one another by escarpments or shore cliffs formed by wave erosion. Flat terraces, composed mainly of sand and gravel deposits, are found at various places around the Lake Superior shoreline and their prominence gave Terrace Bay its name.
HM NumberHM216F
Placed ByArchaeological and Historic Sites Board of Ontario
Marker ConditionNo reports yet
Date Added Monday, August 28th, 2017 at 1:05pm PDT -07:00
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Locationbig map
UTM (WGS84 Datum)16U E 492467 N 5403168
Decimal Degrees48.78146667, -87.10253333
Degrees and Decimal MinutesN 48° 46.888', W 87° 6.152'
Degrees, Minutes and Seconds48° 46' 53.28" N, 87° 6' 9.12" W
Driving DirectionsGoogle Maps
Which side of the road?Marker is on the right when traveling East
Closest Postal AddressAt or near ON-17, Terrace Bay Ontario P0T, CA
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