. Bulletin of the Geological Society of America. Geology. BULL. GEOL. SOC. AM. VOL. 15, 1903, PL. 30. NATURAL BRIDGE, LA PRELE CREEK, SOUTHWEST OF DOUGLAS, WYOMING Shows massive structure and thickness of the Tonsleep sandstone. 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