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What evidence shows that the Gowganda Formation was deposited near the paleoequator?

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A detailed geologic time scale chart displaying Earth's history from the Hadean Eon over 4.5 billion years ago to the present, organized by eons, eras, periods, epochs, and ages with color-coded columns and corresponding dates in millions of years. — Precambrian The stratigraphic chart of geologic time.

The evidence indicating that the Gowganda Formation was deposited near the paleoequator is derived from paleomagnetic studies.2

While glacial deposits are often associated with high latitudes, the presence of these sediments near the equator is a significant finding in Precambrian geochronology. The Gowganda Formation, which is part of the early Proterozoic Huronian glaciation, contains tillites and other glacial features that provide a record of this ancient climate event.21