Proceedings of the American Association for the Advancement of Science, Band 42 |
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ABSTRACT Agric Agriculture Algonkin American animals argillite Association Biloxi blades Born Boston breeding cache Cambridge carbonate of lime Cegiha Charles chert Chicago chips College Committee Conn Cordilleran sea Coryphodon Council Creodonts Cretaceous cusps deposits Dicotyledons Died Eocene evidence evolution F. W. PUTNAM feet flakes flints Geol geological Henry heterodont homodont Indians James John Lake lower Madison mammals Marsupials Mass material meeting Mesozoic method miles Miocene molars Monotremes mound mountain multituberculates Ohio Oreodons Paleozoic paper period Perissodactyls Ph.D phenomena Philadelphia pits Placentals premolars present President primitive Prof Puerco quarry River Rochester Section sediments Sept shaping Siouan Siouan languages species square miles stone strata structure surface teeth theory thickness tion tribes triconodont tritubercular turtle-backs Tutelo ungulate Univ upper village Wahsatch Washington William York
Beliebte Passagen
Seite 17 - ... and softened by invasion of interior heat. This view is therefore satisfactory as far as it goes, and brings order out of the chaos of mountain phenomena. It has successfully directed geological investigation in the past and will continue to do so in the future. But there still remains the question, "What is tJie cause of the lateral pressure?
Seite 43 - I deliberately put aside all teaching of theory, because it seemed to me high time that the facts should be examined by a purely inductive process ; that the nugatory results of all attempts to detect the existence of the Eulerian period probably arose from a defect of the theory itself ; and that the entangled condition of the whole 1 British As-ni'i.'itidii Reports, 1876, Sections, p. 11. 'Comptes Remliic, Vol. 111. p. 6S8. subject required that it should be examined afresh by processes unfettered...
Seite xxix - Science," for the purpose of receiving, purchasing, holdIng and conveying real and personal property, which it now is, or hereafter may be, possessed of, with all the powers and privileges, and subject to the restrictions, duties and liabilities set forth in the general laws which now or hereafter may be in force and applicable to such corporations.
Seite 134 - Dr. Croll agrees with Sir W. Thompson that Professor Tait probably overestimated the time when he affirms that 10,000,000 years is about the utmost that can be allowed, from the physical point of view, for all the changes that have taken place in the earth's surface since vegetable life of the lowest known form was capable of existing there.
Seite 154 - This does not impress me strongly; but from my experience among the Paleozoic rocks I agree with Sir A. Geikie, that "we can see no proof whatever, nor even any evidence which suggests, that on the whole the rate of waste and sedimentation was more rapid during Mesozoic and Paleozoic time than it is to-day.
Seite 144 - Paleozoic (Mississippian) sea extended at times over nearly all of the area subsequently covered by the Cretaceous and the later formations between the Gulf of Mexico and the Arctic ocean. This belt is bounded almost continuously on the east and west by Paleozoic rocks that extend from the Arctic ocean to Mexico, and whether of Cambrian, Ordovician, Silurian or Devonian age they carry essentially the same fauna throughout their extent. In the outcrops of lower strata that rise up through this Cretaceous...
Seite 163 - Challenger' deposits as a guide, the amount of calcium in these deposits, if they be 22 feet thick, is equal to the total amount of calcium in solution in the whole ocean at the present time. It follows from this that, if the salinity of the ocean has remained the same as at...
Seite 137 - In scientific as in other mundane questions there may often be two sides, and the truth may ultimately be found not to lie wholly with either. I frankly confess that the demands of the early geologists for an unlimited series of ages were extravagant, and even, for their own purposes, unnecessary, and the physicist did good service in reducing them.
Seite 44 - Eulerian period (of 305 days) probably arose from a defect of the theory itself, and that the entangled condition of the whole subject required that it should be examined afresh by processes unfettered by any preconceived notions whatever.
Seite xxx - The objects of the Association are, by periodical and migratory meetings, to promote intercourse between those who are cultivating science in different parts of the...