Neoproterozoic basin evolution in Fennoscandia, East Greenland and Svalbard     

Johan Petter Nystuen Arild Andresen Risto A. Kumpulainen Anna Siedlecka 《《幕》》2008,31(1):35-43

Neoproterozoic successions of Fennoscandia, East Greenland and Svalbard are related to crustal extension and formation of sedimentary basins along the margins of northern Baltica （ Fennoscandia ） and eastern Laurentia （East Greenland and Svalbard）, preceding final break-up of Rodinia. The early rift stage （late Tonian-Cryogenian） is characterized by up to 16 km thick sedimentary successions of deep-marine sandstones and conglomerates linked to rift and strike-slip basins. Pericratonic basins expanded during Cryogenian-Cambrian coastal onlap. Cryogenian tropical climate is reflected by carbonate and evaporitic formations, most of which predate Cryogenian-Ediacaran glaciations. Glacial units, collectively referred to the Varanger Ice Age, may be equivalent to the Marinoan （c. 630 Ma） and the Gaskiers （c. 580 Ma） glacial periods. The final stage in break-up of Rodinia commenced with the emplacement of dolerite dyke swarms along the Baltoscandian margin at c. 600 Ma and the opening of the lapetus Ocean and other sea ways. No such dyke swarms have been recorded along the East Greenland segment of the Laurentian margin. Several Tonian-Cambrian tectonic and magmatic events recorded within the Kalak Nappe Complex in northern Finnmark make this unit an exotic terrane relative to the autochthonous Baltoscandian platform.  相似文献   

Coronal ⋌5303 intensity,geomagnetic activity and solar sources of high-speed plasma streams     

Arild Gulbrandsen 《Planetary and Space Science》1974,22(5):841-857

Investigations during the last 30 yr of the relationship between the green emission line corona and geomagnetism have yielded contradictory results. The papers on this subject can be separated into 2 groups; (a) papers reporting a negative correlation between green line intensity and geomagnetic activity, and (b) papers reporting a positive correlation. The negative correlation seems to be the one better supported by solar wind theory and observations. It implies that solar active regions are the base of low expansion speeds, whereas quasistationary high-speed solar plasma streams originate from regions of low density and open magnetic field structuresIn the present paper we have re-examined some of the analyses described in the group (b) papers. It is found that instead of indicating a positive correlation, these analyses in fact favour the negative correlation. Thus there does not appear to be any conflict at all between the different papers. The interpretation in favour of the positive correlation seems to be due to some accident of perspective having obscured the true connection  相似文献   

Norway and sea the shifting importance of marine resources through Norwegian history     

A. Holt-Jensen 《GeoJournal》1985,10(4):393-399

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Integrated marine policy: What? Why? How?     

Arild Underdal 《Marine Policy》1980,4(3):159-169

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Some new German and Scandinavian books on the history and scope of geography     

A. Holt-Jensen Dr. 《GeoJournal》1983,7(2):193-195

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Governing complexity for reducing emissions from deforestation and forest degradation (REDD)     

Arild Vatn 《Climate Policy》2014,14(6):801-803

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