. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 13.— Section along the railway showing white novaculitic sandstone bed under tillite bed. white, fine, silicious sandstone from near the base of the Permian section. This occurrence of the fine white sandstone in the boulder-beds from Sao Paulo southward in close association with the preglacial stratum of the same character is strong evidence of the eastern derivation of the erratics. Conglomerates at Ponia Grossa: — Overlying the trap-invaded fossili- ferous Devonian shales which underlie the "big point&quo
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 13.— Section along the railway showing white novaculitic sandstone bed under tillite bed. white, fine, silicious sandstone from near the base of the Permian section. This occurrence of the fine white sandstone in the boulder-beds from Sao Paulo southward in close association with the preglacial stratum of the same character is strong evidence of the eastern derivation of the erratics. Conglomerates at Ponia Grossa: — Overlying the trap-invaded fossili- ferous Devonian shales which underlie the "big point" between. w /£^<^T7','.' V^'-mI^izis-s^ ' Fig. 14.— Section of Permian conglomerate beds in vicinity of Ponta Grossa, Paran4. streams on which the city of Ponta Grossa stands, there are to be seen on the northwest of the town near the base of the Permo-Car- boniferous series, at least two beds of waterworn conglomerate (Fig. 14) interpolated in a thick sandstone series. These waterworn pebbles present in themselves no evidence of glacial origin or trans- portation. The lower pebble bed, from four to five feet thick, is made up of subangular to well rounded, waterworn, light-colored sandstone pebbles from .5 inch to 6 inches in diameter. Rarely larger cobble-. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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Keywords: ., bookauthorha, bookcentury1900, bookdecade1910, booksubjectzoology
