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Environmental Reconstruction In The Orangeville Moraine, John R. Nephew

Theses and Dissertations (Comprehensive)

Primary sedimentary structure of topographic features in a selected portion of the Orangeville Moraine is examined for the purpose of deriving paleoenvironmental conditions existent during the formation of that feature. Five different environments could be recognized: 1. Sub-glacial tunnel, 2. Pro-glacial outwash, 3. Lacustrine, 4. Sub-glacial, and 5. Pro-glacial sub-aerial outwash.

Sub-glacial tunnels were represented topographically by discontinuous ridges and sinuous depressions, and sedimentologically by massive matrix-supported gravels. Pro-glacial outwash was represented typographically by elongated hills and ridges, and sedimentologicallyby various sediment complexes that revealed both rapid downstream reductions in flow competency, and a downstream change from fluvial to lacustrine …