SOME PLANT MIGROFOSSILS IMPORTANT TO PRE-CARBONIFEROUS STRATIGRAPHY AND CONTRIBUTING TO OUR KNOWLEDGE OF THE EARLY FLORAS

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Abstract
Fifty-six recently discovered spores and sporelike microfossils from Canadian non-coaly deposits of Middle and Upper Devonian age are described and classified. Their manner of occurrence suggests their probable usefulness in the establishment of biostratigraphic entities, and their applicability to the stratigraphic study of oil-bearing rocks. Relative to the history of plants, the microfossils convey evidence of a. more complex and more highly evolved Devonian flora than has been apparent from the macrofossil record. In addition, preliminary examination has disclosed spores of comparable abundance and of only slightly less complexity in rocks of Lower Devonian and Silurian age.