Bulletin of the Geological Society of America, Band 16The Society, 1905 Vols. 1-44 include Proceedings of the annual meeting, 1889-1933, later published separately. |
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Andere Ausgaben - Alle anzeigen
Häufige Begriffe und Wortgruppen
albite amphibolite ankerite anticline Baltimore gneiss band basins bottom calcite canyon cavities Cayuga central character clay cliffs coarse color conglomerate creek Cretaceous crystalline crystals deep deposits depth diabase dike Dolores drift drumlins east erosion evidence fact fault fauna feet feldspar FIGURE Finger Lakes Fishers island folding formation fossils gabbro GEOL geologists glacial erosion glaciers glass gneiss grained granite gravels hanging valleys holyokeite hornblende ice erosion igneous island Jurassic layers limestone lower magma magnetite mass material miles mineral moraine mountains occur origin orthoclase palagonite paper Pelé Piedmont plagioclase plate plateau portion present probably Professor pyroxene quartz quartzite Red beds reefs region ridges river rock sand sandstone schists Seneca serpentine shales sheet side Sierra slope strata stratigraphic stream structure surface thickness tion topography trap Triassic tributary U. S. Geological Survey unconformity upper volcanic Wissahickon York
Beliebte Passagen
Seite 554 - Osteology of Haplocanthosaurus, with description of a new species, and remarks on the probable habits of the Sauropoda and the age and origin of the Atlantosaurus beds.
Seite 498 - P. 1353. A new batrachian and a new reptile from the Trias of Arizona.
Seite 139 - And, indeed, so long as relative age only is spoken of, correspondence in succession is correspondence in age; it is relative contemporaneity. But it would have been very much better for geology if so loose and ambiguous a word as " contemporaneous " had been excluded from her terminology, and if, in its stead, some term expressing similarity of serial relation, and excluding the notion of time altogether, had been employed to denote correspondence in position in two or more series of strata. In...
Seite 139 - Allied with geology, palaeontology has established two laws of inestimable importance : the first, that one and the same area of the earth's surface has been successively occupied by very different kinds of living beings ; the second, that the order of succession established in one locality holds good, approximately, in all.
Seite 155 - ... fatal to the salt-water hypothesis accounting for the Hudson water body, unless those drawn from the phenomena on the outside of the moraine be such, it is likewise true that the facts are not fatal to the lake hypothesis, unless the sponge spicules reported fro'm Croton represent salt-water species.1 Aside from these sponge spicules, the weight of the evidence seems to be in favor of the lake hypothesis.
Seite 139 - There seems, then, no escape from the admission that neither physical geology, nor paleontology, possesses any method by which the absolute synchronism of two strata can be demonstrated. All that geology can prove is local order of succession.
Seite 578 - In the valleys between the drumlins. there are several eskers, which as a rule are in a general way parallel with their longer axes, but in a few instances cross their trend nearly at right angles. In one example, an esker extends each way from a transverse trench in a drumlin : and in a few instances, eskers occur on the tops of drumlins.
Seite 330 - Baltimore gneiss, which occurs in several well-defined areas between the Susquehanna and Potomac rivers. The easternmost of these Baltimore gneiss occurrences is within the area of Cecil County, east of the Susquehanna River, and extends from this point southwestward, widening to an area of five miles or more in breadth where it is overlain by Coastal Plain deposits in Harford County.
Seite 478 - ... the most striking and typical features of those marvelous plateau landscapes which will be subjects of wonder and delight to all coming generations of men. The most superb canyons of the neighboring region, the Canyon de Chelly and the Del Muerto, the lofty pinnacles and towers of the San Juan country, the finest walls in the great upper chasms of the Colorado, are the vertical edges of this red sandstone.
Seite 574 - The study of the rocks — shales and dolomitic limestones — of the upper portion of the Salina epoch in Central New York shows that celestite -occurs quite widely disseminated throughout them (1) in the form of well developed crystals and (2) in small circular spots. The celestite was no doubt deposited simultaneously with the rock material. The rocks on the Island of Put-In-Bay, Lake Erie, and in southern Michigan, especially those at the Maybee quarry, Monroe Co., show a similar occurrence of...