458 resultados para Volcanoes.
Resumo:
No more published.
Resumo:
Translation of: Istoria dell'incendio del Vesuvio, written by Francesco Serao.
Resumo:
Mode of access: Internet.
Resumo:
Mode of access: Internet.
Resumo:
Bibliography included in "Anmerkungen": p. 39.
Resumo:
Subtitle: And among the geysers, cañons, cataracts, forests, lakes, mammoth springs, mud volcanoes, and boiling cauldrons of the national park, containing descriptions of this recently explored region, sketches of Indian customs and traditions, thrilling adventures, and anecdotes and incidents of camplife in the mountains, with an account of the capture and sufferings of a party of tourists who fell into the hands of the Nez-Percés, under Joseph, in the summer of 1877.
Resumo:
Bound with: Merzbacher, Gottfried. Vorläufiger bericht über eine in den jahren 1902 und 1903 ausgeführte forschungsreise in den zentralen Tian-Schan.
Resumo:
Mode of access: Internet.
Resumo:
Bibliography: p. [453]-466.
Resumo:
1 fold. plate and one fol. table follow text.
Resumo:
Includes index.
Resumo:
Atlas has cover-title only, with date 1836.
Resumo:
Contains bibliographies.
Resumo:
Mode of access: Internet.
Resumo:
Tephra fallout layers and volcaniclastic deposits, derived from volcanic sources around and on the Papuan Peninsula, form a substantial part of the Woodlark Basin marine sedimentary succession. Sampling by the Ocean Drilling Program Leg 180 in the western Woodlark Basin provides the opportunity to document the distribution of the volcanically-derived components as well as to evaluate their chronology, chemistry, and isotope compositions in order to gain information on the volcanic sources and original magmatic systems. Glass shards selected from 57 volcanogenic layers within the sampled Pliocene-Pleistocene sedimentary sequence show predominantly rhyolitic compositions, with subordinate basaltic andesites, basaltic trachy-andesites, andesites, trachy-andesites, dacites, and phonolites. It was possible to correlate only a few of the volcanogenic layers between sites using geochemical and age information apparently because of the formation of strongly compartmentalised sedimentary realms on this actively rifting margin. In many cases it was possible to correlate Leg 180 volcanic components with their eruption source areas based on chemical and isotope compositions. Likely sources for a considerable number of the volcanogenic deposits are Moresby and Dawson Strait volcanoes (D'Entrecasteaux Islands region) for high-K calc-alkaline glasses. The Dawson Strait volcanoes appear to represent the source for five peralkaline tephra layers. One basaltic andesitic volcaniclastic layer shows affinities to basaltic andesites from the Woodlark spreading tip and Cheshire Seamount. For other layers, a clear identification of the sources proved impossible, although their isotope and chemical signatures suggest similarities to south-west Pacific subduction volcanism, e.g. New Britain and Tonga- Kermadec island arcs. Volcanic islands in the Trobriand Arc (for example, Woodlark Island Amphlett Islands and/or Egum Atoll) are probable sources for several volcaniclastic layers with ages between 1.5 to 3 Ma. The Lusancay Islands can be excluded as a source for the volcanogenic layers found during Leg 180. Generally, the volcanogenic layers indicate much calc-alkaline rhyolitic volcanism in eastern Papua since 3.8 Ma. Starting at 135 ka, however, peralkaline tephra layers appear. This geochemical change in source characteristics might reflect the onset of a change in geotectonic regime, from crustal subduction to spreading, affecting the D'Entrecasteaux Islands region. Initial 143Nd/144Nd ratios as low as 0.5121 and 0.5127 for two of the tephra layers are interpreted as indicating that D'Entrecasteaux Islands volcanism younger than 2.9 Ma occasionally interacted with the Late Archean basement, possibly reflecting the mobilisation of the deep continental crust during active rift propagation.