American Journal of Science and Arts

acid amount angles appears base basin beds cent closely color columns complete considerable containing crystal curve deposits described determined direction east effect equation evidence experiments faces fact fauna feet field figures formation fossils Geological give given glass heat Hills important indicated interest ionization ions known latter less light limestone lower material means measured method miles mineral nature nearly noted observations obtained occur origin oxide parallel period plane plates Pleistocene portion position possible precipitate present pressure probably produced Professor range rays recent referred refraction regard region relations Report River rocks sandstone seen separated Serra shale shown side solution species specimens surface taken temperature theory thickness tion United upper valley volume wave weight