Abstract

Introductory

When attending the summer meetings of the American Association for the Advancement of Science during the past three or four decades, I have been impressed by the fact that the majority of the papers read before Section E were concerned with the phenomena of the glacial drift. The reason for this is not far to seek, since the drift is the surface formation nearly everywhere present in the northern part of the country, and the question of its origin and the relations of its different phases make it a never-to-be-exhausted subject for the exercise of the imagination and ingenuity of the investigator.

I have also been impressed by the results and conclusions of the different geologists as illustrating how doctors disagree.

So in our Southern Coastal Plain we have in the Grand Gulf and Lafayette two formations occupying the greater part of its surface, about which our doctors disagree. . . .

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