. Bulletin of the Geological Society of America. Geology. COMPOSITION OF PERNAMBUCO REEF 3 Record of a Boring on the Pernambuco Stone Reef Meters Hard reef rock White sand Shells Gray sand Broken rock Dark sand Mottled clay Yellow clay Gray sand . ... White sand In another bore the hard reef rock at the top was found to be about 4 meters thick ; otherwise the records of the two other holes closely resemble this one. It is not known what is meant in the record by. Figure 1.—Bird's-eye View of the Region about Traigao and the Mouth of Rio Mamangu
. Bulletin of the Geological Society of America. Geology. COMPOSITION OF PERNAMBUCO REEF 3 Record of a Boring on the Pernambuco Stone Reef Meters Hard reef rock White sand Shells Gray sand Broken rock Dark sand Mottled clay Yellow clay Gray sand . ... White sand In another bore the hard reef rock at the top was found to be about 4 meters thick ; otherwise the records of the two other holes closely resemble this one. It is not known what is meant in the record by. Figure 1.—Bird's-eye View of the Region about Traigao and the Mouth of Rio Mamanguape. Showing the relations of the stone reef to the shore. 11 broken ; In none of the holes was there any repetition, at greater depth, of the hard top rock; the underlying materials were either clays or they were loose and frag mental. The reefs are off the shore a little way and approximately parallel. 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
