Title: Quaternary Stratigraphy of the Coastal Bluffs of Lake Ontario East of Oshawa
Abstract: The shore bluffs between Oshawa and Port Hope have good, albeit discontinuous, exposures of Wisconsin glacial and interstadial deposits. The stratigraphic units show strong lateral variations in thickness and lithology. Most of them have undergone considerable local erosion. Some are found as isolated remnants. The reconstructed generalized stratigraphic sequence can be correlated on the basis of gross lithology and stratigraohic position to the classical sequence of Scarborough (to date no sufficient organic material has been found in the eastern sections to be dated). Variations that occur between the two areas relate to different environments and to the closer proximity of the eastern sequences to the Pre-cambrian source and to a calcareous shale substratum. To facilitate communication, tentative informal names have been given to the major till layers. Accordingly, the Port Hope till is correlated with the Sunnybrook till of Scarborough, “the Bond Head till with the Seminary (or Meadowcliffe (?)), and the Bowmanville with the former Lower Leaside. Local occurrences of a blocky, silty upper till can be tentatively correlated lithologically with the Halton till. Detailed analysis of the waterlaid sequences has revealed well developed interstratifications of waterlaid tills (pebbly sandstones) within other lacustrine deposits, and, most importantly, large valleys probably cut during the Plum Point interstadial and filled by cross-bedded, sorted sands, and in part, by Bowmanville till.
Publication Year: 1984
Publication Date: 1984-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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Cited By Count: 8
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