This collection of papers stems from a symposium titled “Understanding the Precambrian”, held during the GAC/MAC annual meeting in London, Ontario in November 2021. The premise of this symposium was to honor the many contributions made by Grant Young, in the fields of Precambrian stratigraphy, sedimentology (particularly glacial environments), geochemistry, basin tectonics, and global correlation, all of which were based on detailed fieldwork and laboratory studies. Abstracts of the 28 papers that were presented at the meeting can be found in the Geological Association of Canada-Mineralogical Association of Canada, Abstract Volume 44 (2021), available from the GAC website (

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