. Bulletin of the Geological Society of America. Geology. Petropolis along the Uniao e Industria road toward Juiz; de Fora and be\'ond almost to Sitio (north of the crest of the Serra da Manticpieira) the domed peaks and ex- foliating cliffs give character to the landscape, f The Pedra de Parahybuna, near Juiz de Fora in Minas Ge- raes, is a fine example of the exfoliation of a massive rock. Dome-like summits are also character- ^ istic of the gneiss and granite areas in the dia- mond district of Minas. X Itatiaia, the noted high mountain in the west end of the state of Rio de Janeiro, has the
. Bulletin of the Geological Society of America. Geology. Petropolis along the Uniao e Industria road toward Juiz; de Fora and be\'ond almost to Sitio (north of the crest of the Serra da Manticpieira) the domed peaks and ex- foliating cliffs give character to the landscape, f The Pedra de Parahybuna, near Juiz de Fora in Minas Ge- raes, is a fine example of the exfoliation of a massive rock. Dome-like summits are also character- ^ istic of the gneiss and granite areas in the dia- mond district of Minas. X Itatiaia, the noted high mountain in the west end of the state of Rio de Janeiro, has the rounded outHnes and exfoliate boulders produced by concentric weathering of massive-. Figure ^.—Dedo de Dens. Gneiss peak near Theresopolis, Organ mountains, Brazil. rock. § Along the coast east and northeast of the bay the topography is in the main a repetition on a small scale of that about Rio de Janeiro. Cape Frio is of crystalline rock (foy- ite), and though the upper portions are- * Reise nach Brasilien. H. Burmeister. Berlin, 1853, pp. 139, 177, 178. t Notes of a Naturalist in South America. John Ball, 1887, p. 314. Bermeister: Reise nach- Brasilien, p. 520. X Ueber das Geognostische Vorkommen der Diamanten. Virgil v. Helmreichen. Wien 184G, p. 7. § Descrip95o do Itatiaia. Por Jos6 Franklin da Silva. Revista do Inst. Hist, do Brazil, xxix, pt. i, pp. 413-418. ExcursOes Geographicas. Pelo Barilo Homem de Mello. Revist Inst. Hist., li, pt. 2» pp. 167-178. Derby says Itatiaia is nephelene syenite instead of granite, as others have stated^ Quar. Jour. Geo!. Soc, 1887, xliii, p. 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]
Size: 1442px × 1734px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectgeology, bookyear1890
