Bulletin of the Geological Society of America . Figure 4.—Geosijnclines of late Loiccr Cambrian Time ILLUSTKATIONS 217. Figure 5.—Geosynclines and their Extensions of Upper Cambrian and Cana-dian Time Intensity of shading indicates areas of greatest subsidence. 218 C. SCHirCHERT THE XOETH AMEBIC AX GEOSYXCLIXES
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1890