Author: Gustavs Vilks
Publisher: R. Duhamel
ISBN:
Category : Foraminifera
Languages : en
Pages : 36

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Author: E. Boltovskoy
Publisher: Springer Science & Business Media
ISBN: 9401728607
Category : Science
Languages : en
Pages : 520

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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 972

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Author: G. D. Garland
Publisher: University of Toronto Press
ISBN: 148759738X
Category : Science
Languages : en
Pages : 293

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Book Description
The possibility that the continents of the earth have undergone major changes in position during the earth's history has fascinated scholars for at least three hundred years. Recently, evidence from several scientific disciplines has shown that the possibility must be very seriously considered in any study of the surface features of the earth. The first part of this volume consists of papers given at a symposium on continental drift, held at the annual meeting of the Royal Society of Canada in Charlottetown in June 1964. They present the views of three geophysicists, a botanist, and an astronomer. In these papers, the present evidence for or against continental drift is reviewed and the authors in most cases draw their own conclusions. The reader will find that there is not unanimous agreement in favour of drift. Nearly all discussions of continental drift stress the possible separation of the Americas from Europe and Africa. Considerable work has been done on the tracing of structures, on each side of the Atlantic Ocean, which might once have been connected. Geologists and geophysicists working in the Arctic or on the eastern seaboard of Canada have an important contribution to make to this subject. The second part of this volume, therefore, consists of a group of papers, also presented at the Charlottetown meeting, which throw light on the complicated crustal structure of these regions. In any attempt to reconstruct North America as part of Europe the features described in these papers will have to be taken into account. Once again, the reader will find differences of opinion on the question of whether the evidence favours a separation of our continent from Europe. Indeed, it is because the theory of continental drift us so difficult to confirm without ambiguity by direct observation that it remains controversial but exciting.

Author: Svend Funder
Publisher: Museum Tusculanum Press
ISBN: 9788763511995
Category : Geology
Languages : en
Pages : 68

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Author:
Publisher: Natural Resources Canada
ISBN:
Category :
Languages : en
Pages : 817

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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 968

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Book Description
1919/28 cumulation includes material previously issued in the 1919/20-1935/36 issues and also material not published separately for 1927/28. 1929/39 cumulation includes material previously issued in the 1929/30-1935/36 issues and also material for 1937-39 not published separately.

Author: A. R. Cameron
Publisher:
ISBN:
Category : Copper ores
Languages : en
Pages : 432

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Author: Yvonne Herman
Publisher: Springer Science & Business Media
ISBN: 1461306779
Category : Science
Languages : en
Pages : 887

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Book Description
The Arctic region has long held a fascination for explorers and scientists of many countries. Despite the numerous voyages of exploration, the na ture of the central Arctic was unknown only 90 years ago; it was believed to be a shallow sea dotted with islands. During Nansen's historic voyage on the polarship Fram, which commenced in 1893, the great depth of the central basin was discovered. In the Soviet Union, investigation of the Arctic Ocean became national policy after 1917. Today research at several scientific institutions there is devoted primarily to the study of the North Polar Ocean and seas. The systematic exploration of the Arctic by the United States com menced in 1951. Research has been conducted year-round from drifting ice islands, which are tabular fragments of glacier ice that break away from ice shelves. Most frequently, ice islands originate off the northern coast of Ellesmere Island. These research platforms are occupied as weather sta tions, as well as for oceanographic and geophysical studies. Several inter national projects, conducted by Canadian, European, and U. S. groups, have been underway during the last three decades. Although much new data have accumulated since the publication of the Marine Geology and Oceanography of the Arctic Seas volume in 1974 (Yvonne Herman, ed. ), in various fields of polar research-including present-day ice cover, hydrogra phy, fauna, flora, and geology-many questions remain to be answered.

Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 726

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