503 resultados para 1490
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The astronomical timescale of the Eastern Mediterranean Plio-Pleistocene builds on tuning of sapropel layers to Northern Hemisphere summer insolation maxima. A 3000-year precession lag has become instrumental in the tuning procedure as radiocarbon dating revealed that the midpoint of the youngest sapropel, S1, in the early Holocene occurred approximately 3000 years after the insolation maximum. The origin of the time lag remains elusive, however, because sapropels are generally linked to maximum African monsoon intensities and transient climate modeling results indicate an in-phase behavior of the African monsoon relative to precession forcing. Here we present new high-resolution records of bulk sediment geochemistry and benthic foraminiferal oxygen isotopes from ODP Site 968 in the Eastern Mediterranean. We show that the 3000-year precession time lag of the sapropel midpoints is consistent with (1) the global marine isotope chronology, (2) maximum (monsoonal) precipitation conditions in the Mediterranean region and China derived from radiometrically dated speleothem records, and (3) maximum atmospheric methane concentrations in Antarctica ice cores. We show that the time lag relates to the occurrence of precession-paced North Atlantic cold events, which systematically delayed the onset of strong boreal summer monsoon intensity. Our findings may also explain a non-stationary behavior of the African monsoon over the past 3 million years due to more frequent and intensive cold events in the Late Pleistocene.
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"The defence of good women was first published in 1540. The only known copy of this edition is in the Henry E. Huntington library; this copy is here reproduced in a line-for-line and letter-for-letter reprint."--Introd., p. viii.
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A page-for-page reprint of the Henry E. Huntington library copy of the 1533 edition. cf. Introd.
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Henry Charteris's preface to 1568 ed. of Lindsay's Works, with reproduction of original t.-p.: 13* p. appended.
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Master of the Saint. Elizabeth Panels; 4 ft. 2 9/32 in.x 3 ft. 7 7/64 in.; oil on panel
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Master of the Saint. Elizabeth Panels; 4 ft. 2 1/8 in.x 3 ft. 7 7/64 in.; oil on panel
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Master of the Saint. Elizabeth Panels; 4 ft. 2 13/64 in.x 3 ft. 7 7/64 in.; oil on panel
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Leonardo da Vinci; 10 15/16 in.x 7 3/4 in.; pen and ink with brown and greenish wash, over black chalk on paper
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Gerard David; 3 35/64 in.x 2 1/8 in.; tempera and gold leaf on parchment that has been trimmed and laid down on thin walnut
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Mode of access: Internet.
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"Bibliographie": p. [635]-650.
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"A dream of John Ball" first appeared in the "Commonweal", 1886-87; issued in book-form, 1888. "A king's lesson", a story based on the life of Matthias Corvinus, also appeared in the "Commonweal", Sept. 18, 1886.
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Mode of access: Internet.
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Datos correspondientes a la segunda parte tomados de CCFR.
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Mode of access: Internet.