GENESIS THE MIRACLES AND THE PREDICTIONS ACCORDING TO SPIRITISM

Allan Kardec

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14. It is essential to remark that the number of these periods is not absolute, and that it depends upon system of classification. One does not comprehend, in the six principal periods designated above, all which are marked by notable and general change in the state of the globe; but observation proves that many successive formations have been produced during the history of each. That is why they are divided into periods, characterized by the nature of the rocks, which bear twenty-six general and very characteristic formations, without counting those which are produced by modifications due to purely local causes.

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