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- The Geology of Pennsylvania, Vol. 1 of 2
The Geology of Pennsylvania, Vol. 1 of 2
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Excerpt from The Geology of Pennsylvania, Vol. 1 of 2: A Government Survey
A like motive - a. Desire to indicate the positions occupied by the several widely-diffused Formations of Pennsylvania and the United States in the general scale of the strata best known to the geological world (i mean the scale of the European Rocks) - has impelled me to add an Essay, originally presented in abstract to the British Association, On the Correlation of the American and British Palaeozoic Strata. It is only through such wide comparisons, cautiously instituted, that we can learn with what portions of the world our country is in nearest affinity.
In the Appendix to this Work there appears, amid other miscellaneous matter, a description of the methods of research employed in the Geological Survey of Pennsylvania, with some suggestions in relation to geological explorations gene rally, adapted to other countries.
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