Examine GSC Map 1253A (Glacial Map of Canada), the Quaternary Geology of Ontario (above), and the surficial deposits in Niagara (Fig. 4). a) Does the Vinemount Moraine pre-date or postdate the Haldimand Clay Plain? Explain your rationale. b) Examine the paleogeographic reconstruction in Figure 5. Relate the surficial geology of the Niagara to the last readvance of the Laurentide Ice sheet into the region – which unit(s) deposited during which stadial?


