964 resultados para Islands of the Pacific -- Politics and government
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A three-fold expansion of the Antarctic ice sheet at 13.60, 12.82, and 11.60 Ma has been inferred from delta18O maxima analyzed in planktonic and benthic foraminiferal tests, although accompanying changes in sea surface temperature have not been detailed. We present estimated changes in middle Miocene surface-water temperatures based on analysis of delta18O in planktonic foraminifera collected at mid-latitude Deep Sea Drilling Project sites in the North Atlantic and South Pacific oceans. We also identify periods of ice-sheet growth based on comparisons of benthic and planktonic foraminiferal delta18O values. Our results indicate: (1) a distinct cooling of the sea surface from 13.6 to 13.5 Ma immediately following a peak in ice volume at 13.6 Ma, (2) a cooling of the sea surface during a period of increasing ice volume from 13.2 to 13.0 Ma, and (3) a development of the Antarctic ice sheet during a period of cooling of the sea surface centered at 11.6 Ma.
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On t.-p., seal of Department of the navy, Bureau of medicine & surgery.
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Microform.
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"This report represents a cooperative study between the Bureau of mines, Department of commerce, and the College of mines, University of Washington."
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"Published by the Academy of science, May, 1899."
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Mode of access: Internet.
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Presented by Mr. Willis. Ordered to be printed May 10 (calendar day, May 12), 1926.
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Mode of access: Internet.
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"Published under order of the city council"--T.p.
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Errata, last leaf.
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"First edition."
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Includes documents in Spanish and English.
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Binder's title: Peruvian-Chilean arbitration. Appendix to the counter case of Peru.
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Mode of access: Internet.