The Journal of Geology, Volumen9Thomas Chrowder Chamberlin University of Chicago Press, 1901 Vols. for 1893-1923 includes section: "Reviews." |
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Página 10
... thickness of the wall . All these characters vary , and the varia- tion of all should be noted in learning the species . Extremes may be associated on parts of the same specimen . Prasopora simulatrix Ulr . grew upon some solid surface ...
... thickness of the wall . All these characters vary , and the varia- tion of all should be noted in learning the species . Extremes may be associated on parts of the same specimen . Prasopora simulatrix Ulr . grew upon some solid surface ...
Página 13
... thickness , and in very " old " specimens distinctly cup - shaped calycals form ( Pl . A , Fig . 11 ) . The thickened wall permits analysis into the bounding edge with its projection downwards , as dividing lamina , and the calycal ...
... thickness , and in very " old " specimens distinctly cup - shaped calycals form ( Pl . A , Fig . 11 ) . The thickened wall permits analysis into the bounding edge with its projection downwards , as dividing lamina , and the calycal ...
Página 20
... When once begun , the wart may have its own growth , so to say , independent of the wall thickness ( Fig . g ) , becoming so large as to appear to have displaced a young cell or mesopore . Such 20 FREDERICK W. SARDESON.
... When once begun , the wart may have its own growth , so to say , independent of the wall thickness ( Fig . g ) , becoming so large as to appear to have displaced a young cell or mesopore . Such 20 FREDERICK W. SARDESON.
Página 21
... thickness also , and hence acanthopores might well be four or more times the thickness of the wall from result of secretion alone . In fact , it is necessary to explain why the walls , etc. , can be very thin , which is evidently ...
... thickness also , and hence acanthopores might well be four or more times the thickness of the wall from result of secretion alone . In fact , it is necessary to explain why the walls , etc. , can be very thin , which is evidently ...
Página 22
... thickness of tabulæ may be ascribed to difference of growth and to secretion of substance . Difference in form , such as the cystiphrams ( Prasopora ) , are ascribable to shape and size of the zooids ' base ; and vesiculose mesopores ...
... thickness of tabulæ may be ascribed to difference of growth and to secretion of substance . Difference in form , such as the cystiphrams ( Prasopora ) , are ascribable to shape and size of the zooids ' base ; and vesiculose mesopores ...
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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.