ice age has led to the more recent impression that the entire time period represents a single glacial event. The term Huronian is used to describe a lithostratigraphic supergroup and should not be used to describe glacial cycles, according to The North American Stratigraphic Code, which defines the proper naming of geologic physical and chrono units. Diachronic or geochronometric units should be used.

Geology and climate

The

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