The Journal of Geology, Volumen9Thomas Chrowder Chamberlin University of Chicago Press, 1901 Vols. for 1893-1923 includes section: "Reviews." |
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Página 9
... regions , the axial or " immature " region of vertical cell part ( Fig . 6 , b , a ) , and the peripheral or " mature " of laterally directed cell ( Fig . 6 , c , d ) . In the peripheral region the cells grew slower in length , have ...
... regions , the axial or " immature " region of vertical cell part ( Fig . 6 , b , a ) , and the peripheral or " mature " of laterally directed cell ( Fig . 6 , c , d ) . In the peripheral region the cells grew slower in length , have ...
Página 12
... regions are evident when there is even no acrogene growth . Omitting some details , the peripheral region has thick walls on which are well - developed spines , acanthopores . Mesopores may be very few or , again , very numerous on ...
... regions are evident when there is even no acrogene growth . Omitting some details , the peripheral region has thick walls on which are well - developed spines , acanthopores . Mesopores may be very few or , again , very numerous on ...
Página 13
... region , and they are not called mesopores . The mesopores of the axial region are not imma- ture cells but permanently retarded ones . With this species is conveniently compared B. ( Hemiphragma ) ottawaense Foord , in which the thin ...
... region , and they are not called mesopores . The mesopores of the axial region are not imma- ture cells but permanently retarded ones . With this species is conveniently compared B. ( Hemiphragma ) ottawaense Foord , in which the thin ...
Página 16
... region of greatest cell increase being that of greatest zoarial growth , and inversely . The change of zoarial form , nevertheless , must be made to explain the change of cell as seen in different regions in the same species . Thus , in ...
... region of greatest cell increase being that of greatest zoarial growth , and inversely . The change of zoarial form , nevertheless , must be made to explain the change of cell as seen in different regions in the same species . Thus , in ...
Página 17
... region , and in thin , laminar , or encrusting forms it is very distinct . In these cases the stolonal has been said to be probably the homologue of the axial immature region of dendroid zoaria . The stolonal and immature regions in ...
... region , and in thin , laminar , or encrusting forms it is very distinct . In these cases the stolonal has been said to be probably the homologue of the axial immature region of dendroid zoaria . The stolonal and immature regions in ...
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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.