. The Canadian field-naturalist. 1964 Hogarth: Pseudofossils near Old Chelsea. Figure 1. Map of the Old Chelsea district showing generalized geology and occurrences of jasper and 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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