Pliocene and Pleistocene . line of evidence has been used whenever available, it hasbeen found more helpful to employ the criteria of topography than thatof paleontology. This is correlation by what McGee has called themethod of homogeny. Prom the bottom to the top of the Coastal Plain deposits of Maryland,the formations are separated by a large number of which have been prosecuted by those who have worked in thisregion have shown that the efl-stern border of North America has beenalternately below water receiving deposits and above sea level undergoingerosion. This unea
Pliocene and Pleistocene . line of evidence has been used whenever available, it hasbeen found more helpful to employ the criteria of topography than thatof paleontology. This is correlation by what McGee has called themethod of homogeny. Prom the bottom to the top of the Coastal Plain deposits of Maryland,the formations are separated by a large number of which have been prosecuted by those who have worked in thisregion have shown that the efl-stern border of North America has beenalternately below water receiving deposits and above sea level undergoingerosion. This uneasiness of the sea margin exhibited throughout Meso-zoic and early Cenozoic time is still more manifest and striking throughlater Cenozoic and Eecent time. Among the most interesting discoverieswhich have come to light in prosecuting the work on the surficial depositsis the undoubted oscillations of the land border. These results have animportant bearing on the theory of isostasy. PLIOCENE ;mci PLEISTOCENK PLATE 1 Wboibiu^. 39OOcu31924004099838
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