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3 revisions	EricRoscoe at Aug 15, 2022 11:20 AM	Compared with
Aug 15, 2022 EricRoscoe Aug 11, 2022 AlRice Mar 23, 2020 Wisconsin Historical Society	p.7 7 probable that four fifths of Wisconsin has been dry land. The temperature of the climate is supposed to have been much higher than a percent during the time from the deposition of the lower Silurian to the beginning of the glacial period at the close of the tertiary age. This long period of high temperature must have had its excessive warm rains, such as are now found in some tropical districts, causing denudations, and transportation of detritus far beyond any now observed in Wisconsin. [pencil drawn drawing] Rivers have cut their channels through the overl[a]ying sand rock in numerous places near the southern margin of the aroic as represented in this figure.	p.7 7 probable that four fifths of Wisconsin has been dry land. The temperature of the cliamte is supposed to have been much higher than a percent during the time from the deportion of the lower sulurian to the beginning of the glacial period at the close of the tertiary age. This long period of high temperature must have had its excessive warm rains, such as are now found in some tgropical districts, causing denundations, and transportation of detritus far beyond any now observed in Wisconsin. [pencil drawn drawing] Rivers have cut their channels through the overl[a]ying sand rock in numerous places near the southern margin of the aroic as represented in this figure.

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