The Journal of Geology, Volumen9Thomas Chrowder Chamberlin University of Chicago Press, 1901 Vols. for 1893-1923 includes section: "Reviews." |
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Resultados 1-5 de 74
Página 4
... range and variability of one and many species is made practicable ; it serves to direct to best advantage the use of thin sectioning ; recognition of species even in the field becomes thereby entirely practicable . Having learned to ...
... range and variability of one and many species is made practicable ; it serves to direct to best advantage the use of thin sectioning ; recognition of species even in the field becomes thereby entirely practicable . Having learned to ...
Página 22
... ranges in extremes from none , as seen in the axial region of some species , to very many in others , or even to a compacted papillose mass filling the cells , or especially the mesopores in some thick - walled forms . There is no unit ...
... ranges in extremes from none , as seen in the axial region of some species , to very many in others , or even to a compacted papillose mass filling the cells , or especially the mesopores in some thick - walled forms . There is no unit ...
Página 43
... usions of schist and " Roche Dioritique . " The osed of granite with pre - Cambrian limestone and on in the center of the range is formed by a ich is altered by the granite . somewhat softened and pulled out into more or less elongated.
... usions of schist and " Roche Dioritique . " The osed of granite with pre - Cambrian limestone and on in the center of the range is formed by a ich is altered by the granite . somewhat softened and pulled out into more or less elongated.
Página 43
... of granite with pre - Cambrian limestone and " Roche Dioritique . " The depression in the center of the range is formed by a Permo - Carboniferous limestone , which is altered by the granite . 1 T FIG . 3 . Quarry in Nepheline Syenite.
... of granite with pre - Cambrian limestone and " Roche Dioritique . " The depression in the center of the range is formed by a Permo - Carboniferous limestone , which is altered by the granite . 1 T FIG . 3 . Quarry in Nepheline Syenite.
Página 65
... range from the size of small peas in meteorites of agglomerated structure through that of coarse sand in those which are sandstone- like to that of splinters and fine dust in the tuffaceous meteorites . In the agglomerated meteorites it ...
... range from the size of small peas in meteorites of agglomerated structure through that of coarse sand in those which are sandstone- like to that of splinters and fine dust in the tuffaceous meteorites . In the agglomerated meteorites it ...
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Términos y frases comunes
acid acrogene Archean autocells basin Bedford beds Berea biotite body bowlder Bryozoa Canyon carbonate Carboniferous cave cell cent character chondri chrysolite clay coal color composition conglomerate containing copper Creek crystals deposits described Devonian division earth east evidence exposure fauna feet feldspar formation fossils fragments fulgurite Geological Survey geologists glacial glaciers gneisses goniatite grains granite groundmass Indiana indicated interglacial iron Jour Kinderhook Lake layers limestone lithologic lower marl mass mesopores miles minerals Mountains observed occur Ohio Ontario origin Oriskany orthoclase oxidized Paleozoic Permian phenocrysts plates porphyritic portion present probably Professor pyroxene quarry quartz region represented Rept River Roche sphere rocks sand sandstone Scarboro schists shale shown species specimens stone meteorites strata stratified stratigraphic structure surface Surv tabulæ terrestrial thickness thin tion Trepostomata U. S. Geol upper valley walls Waverly
Pasajes populares
Página 273 - Results of the Pendulum — Observations and some Remarks on the Constitution of the Earth's Crust.
Página 368 - Report upon the Condition and Progress of the US National Museum during the year ending June 30, 1896.
Página 95 - Ward, LF 1900. Status of the Mesozoic floras of the United States. First paper: The older Mesozoic. US Geol. Surv., 2Oth Ann.
Página 469 - ... and the explanation of this correspondence he believed to be a causal one, the planes of separation, or jointing, being locally gaping where the streams adhere to the joint direction, but closed where they have been diverted from the course of the joint. Van Hise3 has in a similiar way explained the zigzags of 1 Published with the permission of the Director of the US Geological Survey. 3 DAUBREE : Ge'ologie Experimentale.
Página 448 - Thin sections of these rocks show the same polygonal shapes of the grains of quartz, and more or less iron ore is associated with specimens from each locality. It is very probable, then, that the same horizon exists at points far to the west of Lake Superior. Turning toward the east, specimens very like the jaspery varieties of the...
Página 207 - for the rocks occurring between the "argillaceous slaty rock, or shale stratum," now known as the Ohio shale, and the "conglomerate" which lies at the base of the Coal-measures. Waverly is the name of the capital of Pike county in southern Ohio and Professor Briggs stated that "As some of the most beautiful stones that have been obtained were quarried at Waverly, we may, for the present, denominate these rocks the Waverly sandstone series."' In the following report, for some reason, Professor Briggs...
Página 96 - On some additional or imperfectly understood fossils from the Cretaceous rocks of Queen Charlotte Islands, with a revised list of the species from these rocks.
Página 552 - Paleontological Notes. I. On Two New Arthrodires from the Cleveland Shale of Ohio. II. On the Characters of Mylostoma Newberry. III. Further Notes on the Relationships of the Arthrognathi.
Página 132 - The fauna in these fine shales in Arkansas, terminating and following the black shales, is unmistakably much higher than the Genesee black shale of New York. Faunally, it is the correlative of the Louisiana or lithographic limestone, and is thus as late as the Kinderhook stage of the Eocarboniferous.
Página 539 - The stratigraphic succession of the fossil floras of the Pottsville formation in the southern anthracite coal field, Pennsylvania, by David White.