The Journal of Geology, Band 13Thomas Chrowder Chamberlin University of Chicago Press, 1905 Vols. for 1893-1923 includes section: "Reviews." |
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Häufige Begriffe und Wortgruppen
Atlantosaurus baselevel basin beds bones Brezoi Bulletin Burlington calcium character clay Cliffwood conglomerate Corniferous Cretaceous cubic miles deposits described Diadectidae dikes Dillard district drainage drift east Eocene erosion Eryops evidence facies fauna feet foramen fossils genus Geologist glacial glacier glauconite gorge grains granite gravels gray Hallopus hanging valleys horizon Huronian igneous intercentrum intrusion Journal of Geology Kinderhook laccolith Lake Creek later layers limestone lithologic lower marls material mineral moraine mountains Myrtle nodosus occur Oltenia original peneplain plain Plate pleurocentra Pontic portion posterior present probably quadrangle quarry quartzite range region Report ridge River rocks salt formation sand sandstone Sarmatian Scaphites schists sediments serpentine shales shell side skull slopes species specimens strata streams surface suture teeth Tennessee Tertiary thickness tion Tortonian U. S. Geological Survey unconformity undet upper valley vertebræ Walden Ridge zone
Beliebte Passagen
Seite 378 - ... [Davenport, Iowa, 1904.] • — HATCH, FREDERICK H., and CORSTORPHINE, GEO. S. The Petrography of the Witwatersrand Conglomerates, with Special Reference to the Origin of the Gold (read November 14, 1904). [Reprinted from the Transactions of the Geological Society of South Africa, Vol. VII, Part III, 1904.] — The Geology of the Bezuidenhout Valley and the District East of Johannesburg (read August 8, 1904).
Seite 57 - And they remark that the shocks were clearly distinguishable into two classes; those in which the motion was horizontal, and those in which it was perpendicular.
Seite 468 - II, pp. 1-6. Knowlton, FH [Frank Hall]. Note on a supposed new endogenous tree from the Carboniferous. Science, vol. xxi, 1893, pp. 332-333. Kraus, EH [Edward Henry]. On the origin of the caves of the island of Put-in-Bay, Lake Erie.
Seite 89 - REPORT OF THE SPECIAL COMMITTEE FOR THE LAKE SUPERIOR REGION To C. Willard Hayes, Robert Bell, Frank D. Adams, and Charles R. Van Hise, general committee on the relations of the Canadian and the United States Geological Surveys.
Seite 105 - The Accordance of Summit Levels among Alpine Mountains; the Fact and its Significance: Jour.
Seite 511 - Renard, the chambers become filled with muddy sediment, and "if we admit that the organic matter inclosed in the shell, and in the mud itself, transforms the iron in the mud into sulphide, which may be oxidized into hydrate, sulphur being at the same time liberated, this sulphur would become oxidized into sulphuric acid, which would decompose the fine clay, setting free colloid silica, alumina being removed in solution; thus we have colloid silica and hydrated oxide of iron in a state most suitable...
Seite 93 - ... party to infer the existence of an important unconformity between the two. The Penokee-Gogebic, or iron-bearing series, consists of (1) the Tyler slate, (2) the Ironwood formation, and (3) the Palms slate.
Seite 137 - It appears to be a prolongation outwards of the vestibule and sacculus, which may be observed in a less degree in the genus Edaphosaurus (Cope), also from the Texas Permian formation. Here the adjacent bones are produced slightly outwards, and the fenestra ovalis is closed by a large stapes similar in external form to the one I have described in the Clepsydrops leptocephalus.^ Its more intimate structure I have not yet examined.!
Seite 180 - Granite is the principal mountain-making rock in the Wichita region. Its area is greater than that of all the other igneous rocks combined, and is about equal to that of the others and the older Paleozoic sediments. It makes all of the high land of the Wichita, Quana, Devils Canyon, and Headquarters mountains, and a large part of the Raggedy group. "The relations of the granite to the gabbro indicate that the granite is younger and that it intrudes the gabbro. Both occur in large masses, as shown,...
Seite 15 - ... where it is pushed forward by the mass grinding the bottom of the glacier. By this, not only the formation of screes around the glacier is hindered, but also the surrounding cliffs are constantly attacked, for the erosive action begins just at their foot and saps them.