. Bulletin of the Geological Society of America. Geology. 650 R. PUMPELLY EVOLUTION OF OASES AND CIVILIZATIONS CQ HJ MJ W JU 0J UJ ^ t us C£ O • Pi ^. .2 » CO V" 1/. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Geological Society of America. [New York : The Society]

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1890