When did Lakes Michigan, Huron, and Superior drain via the Nipissing spillway to the Ottawa River and the St. Lawrence?
A) in the Archean, prior to 2.5 b.y. ago as recorded by bedrock lithologies
B) in the Early Holocene between 10,500 and 5,500, prior to glacial isostatic rebound
C) prior to the 1930s when the waters were diverted to run hydroelectric stations and create the tourist attraction of Niagara Falls
D) in the 1920s by damming the rivers to make paths for the early log drives

Question

Quizplus · Accepted Answer

The correct answer is B) in the Early Holocene between 10,500 and 5,500, prior to glacial isostatic rebound. This period marks a significant phase in the post-glacial history of the Great Lakes, where changes in water levels and drainage patterns were influenced by the melting of glaciers and the rebounding of the Earth's crust.

When Did Lakes Michigan, Huron, and Superior Drain Via the Nipissing