The Silurian, Devonian And Irvine Formations of East-Central Kentucky
The Silurian, Devonian And Irvine Formations of East-Central Kentucky
August Frederic Foerste
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For this phase of the Fairmount bed, the name Tote layer is suggested, from the very characteristic exposure about KENTUCKY GEOLOGICAL SURVEY. 213 three miles west of Richmond. An equally good exposure is seen along the railroad, south of Maysville. The limestones from the upper part of the Maysville division often contain 75 to 88 per cent, of carbonate of lime, and 6 to 14 per cent, of sdlicious material, \vith little alumina or mag- nesium carbonate. The clays, on the contrary, contain from ...60 to 80 per cent of silicious matter, from 7 to 10 per cent, of alumina, and from 3 to 15 per cent, of lime, being very variable as to their calcareous content. To the strata from the base of the Fairmount bed to the middle or top of the Arnheim bed, Prof. N. S. Whaler gave the name Kentucky river limestone. The Lower Richmond or Waynesville bed, in the greater part of Kentucky, consists of indurated clay rock with a more shaly section at the base. \Yest of the Cincinnati geanticline this is replaced by argillaceous limestone; and towards the Ohio river, on the eastern side of the geanticline, blue clays interbedded with a moderate quantity of thin blue limestones make their appearance.
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