. The Canadian field-naturalist. 1975 RoMANELLi: Champlain Sea in the Gatineau Valley 359 M'ARTINOALE N. SALE 3MILES TO I INCH 1^ Figure 2. Approximate Champlain Sea shoreline 11 500 years in the Gatineau River Valley. Figure 1 except for the overall shrinkage of the sea. Embayments on the western and east- ern shores have almost disappeared but the water levels of the Champlain Sea at that time are still high enough to flood the whole of the Ottawa area. Beaches in the Ottawa area, as indicated by the radiocarbon dates in Table 1, are younger and lower than those found in the Gatineau Ri
. The Canadian field-naturalist. 1975 RoMANELLi: Champlain Sea in the Gatineau Valley 359 M'ARTINOALE N. SALE 3MILES TO I INCH 1^ Figure 2. Approximate Champlain Sea shoreline 11 500 years in the Gatineau River Valley. Figure 1 except for the overall shrinkage of the sea. Embayments on the western and east- ern shores have almost disappeared but the water levels of the Champlain Sea at that time are still high enough to flood the whole of the Ottawa area. Beaches in the Ottawa area, as indicated by the radiocarbon dates in Table 1, are younger and lower than those found in the Gatineau River Valley. The flooding of areas of the Gatineau Valley well to the north of the Ottawa-Hull area either during the time of maximum submer- gence or after is indicated by the fossil occur- rences at Venosta (Antevs 1928), Manitou Lake (Bickel 1970), and Martindale. These localities are all well over 30 miles north of the Ottawa-Hull area. The sparseness of re- ports of marine fossils from these areas relative. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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