A palynological study of surface samples of lake deposits and peat in the Ottawa area has indicated that pollen and spore assemblages obtained from these samples reflect both the local vegetation and the regional one characteristic of the Great Lakes ndash; St. Lawrence Forest Region. Palynological differences between the upland sites and those of the clay plain of the Ottawa Valley are sufficient to identify these environments. Results of this study will help to strengthen the interpretation based on fossil pollen and spore assemblages found in postglacial deposits, when past environments are inferred from these fossil assemblages.
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