Fig. 13.—Current markings on shale, resembling a fossil plant. Reduced from a photograph (Dawson’s Acadian Geology).
Carrying this knowledge with us, and at the same time glancing at the table of successive formations prefixed to this chapter, we shall be prepared, without any additional geological study, to understand the statements to be made in the following chapters, and to appreciate the actual nature of the succession of life in so far as it is at present known.
Magnified and Restored Section of a Portion of Eozoon Canadense.