The Potomac Formation (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from The Potomac Formation

I therefore began my stratigraphical studies upon this theory, and have conducted them from this point of view during a period of three years. As I advanced with the work I became more and more firmly convinced of the correctness of this position, and the results at which I have been able to arrive - due in the main, as I feel sure, to the employment of a correct hypothesis - are so important that-at the risk of seeming to make unsupported assertions I have felt impelled to embody the more general of them in the present paper, in which it will he obviously impossible to give the detailed evidence which has led me to the conclusions stated.

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