978 resultados para Itu granite province


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Colluvial deposits consisting of silts and loams were detected in several climatologically different areas of NE Tibet (3200-3700 m a.s.l.). Layering, distinct organic content and low content of coarse matter as well as location in the relief revealed an origin from low-energy slope erosion (hillwash). Underlying and intercalated paleosols were classified as Chernozems, Phaeozems, Regosols and Fluvisols. Fifteen radiocarbon datings predominant on charcoal from both colluvial layers and paleosols yielded ages between 8988 ± 66 and 3512 ± 56 uncal BP. Natural or anthropogenic factors could have been the triggers of the erosional processes derived. It remains unclear which reason was mainly responsible, due to controversial paleoclimatic and geomorphic records as well as insufficient archaeological knowledge from this region. Determinations of charcoal and fossil wood revealed the Holocene occurrence of tree species (spruce, juniper) for areas which nowadays have no trees or only few forest islands. Thus large areas of NE Tibet which are at present steppes and alpine pastures were forested in the past.

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Characteristic black nodules have been retrieved in 1922 from the bed of the Kichijo River, that runs along the Tanakamiyama mountain in the Oni Province and ends into Lake Biwa in Japan. Their radiocativity has been studied along with that of crusts of similar nature found covering rock formations in the vicinity overlooking the stream. The high content in radium observed may be due to the high uranium content of the granite host rock typical of the Tanakamiyama formation.

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On verso: Class [sic] to the rear wall of Angell Hall and between Angell and Haven Halls. M-12

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1.-5. année, 1881-1885 publié sous la direction du docteur Émile R. Coni.--6.-7. année, 1886-1887 publié sous la direction d'Albert C. Dessein.--8. année, 1888 publié par M. Adolphe Moutier.

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No more published?

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Mode of access: Internet.

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Vols. for <1864?>- printed by: Ottawa : Hunter, Rose, <1865?>-1868.

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Some sessions combined in one issue.

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Each volume contains Appendix.

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Estimates for 1907-1909 (Oct.), 1910/1911 (separately paged and with separate t.p.) issued with 1907-1908, 1909/1910.

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Some vols. are preceded by Imperial Statutes, Orders in Council or treaties relating to or affecting Canada.