摘要:

KÖgler, F.‐C.&Larsen, B. 1979 03 01: The West Bornholm basin in the Baltic Sea: geological structure and Quaternary sediments.Boreas. Vol. 8, pp. 1–22. Oslo. ISSN 0300–9483.The West Bornholm basin is an approx. 1000 km2subbasin of the Bornholm basin just north of Bornholm. The basin has been mapped by acoustic profiling and sampling of the sea floor. The basin is eroded down into Mesozoic sediments which are downfaulted between basement horsts in the Fennoscandian Border Zone. The development of the Quaternary morphology is illustrated by maps of the surface of the bedrock, the glacial landscape beneath the varved clays, the recent topography combined with isopach maps of late Glacial and Holocene formations. Quaternary formations are defined and described. The brown, very fine grained varved clay is deposited as a conformable cover on the substratum. It is probably deposited from suspensions carried in the whole water body, while turbidity currents were of minor importance. The recent sedimentary environment is an example of a restricted, but not totally anoxic basin. The recent sediment is chiefly mud rich in organic matter (ca. 4% Corg). According to a rough estimate, the long‐term mean sedimentation rate of organic carbon is 6 g

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00427.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Scientists of different schools and scientific disciplines have for a long time objected to the use of the term ‘Anthropogene’ as a substitute for ‘Quaternary’. The author of this article believes that from positions of modern science their objections are no longer valid. Discussed are new concepts on the duration of the Anthropogene and principles of its subdivision. The study of the interaction of natural environment and its changes with the development of prehistoric man and society is considered to be the major problem of the Anthr

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00428.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

The popular concept of a Late Weichselian ice sheet covering the Barents Shelf and confluent with the Scandinavian and Russian ice sheets is based primarily on the 6500 B.P. isobase which rises to the east over Spitsbergen, and to the west over Franz Joseph Land. Analysis of uplift curves from the Spitsbergen archipelago shows, however, that the strongest early Holocene uplift occurs over northeastern Spitsbergen and eastern Nordaustlandet, falling both to east and west, and that the centre of uplift migrates to the southeast during the Holocene. Direct evidence of glacier fluctuation indicates an important Billefjorden Stage of glaciation at about 11,000 to 10,000 B.P., part of whose extent can be defined by moraines and by abrupt changes in the marine limit. The dominant ice masses of the Billefjorden Stage seem to have formed over eastern Spitsbergen, Edgeøya, Barentsøya and southern Hinlopenstretet, and it is the decay of this ice mass which is primarily responsible for the pattern of early Holocene uplift.Stratigraphic evidence suggests the absence of an important glacial event at 18,000–20,000 B.P., but an important phase of Spitsbergen‐centred glaciation at about 40,000 B.P., and a glacial phase at 80,000–120,000 B.P. It is suggested that many raised beach sequences outside the Billefjorden readvance show an upper sequence related to deglaciation at about 40,000 B.P., and a lower, Holocene sequence related to decay of the Billefjorden ice. The anomalous pattern of late Holocene uplift may be related to restrained rebound produced by regeneration of ice on the main islands of the archipelago and unrestrained rebound on Hopen and Kong Karls Land, which were incapable of sustaining large ice masses of their own.A pattern of LateGlacial climatic circulation which may have produced ice masses on the east coast of Spitsbergen, west coast of Novaya Zemlya and north coast of Russia is suggested. It is also suggested that this pattern of glaciation produced features which have been wrongly interpreted as evidence of a Barents ic

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00429.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Book reviewed in this article:Niels Foged: Diatom Analyses. The Archaeology of Svendborg, Denmark.J. M. Gray&J. J. Lowe (eds.):Studies in the Scottish Late‐glacial Environment, Pergamon Press, Oxford/New York/ Toronto/Sydney/Paris/Frankfurt 1977. xiii + 197 p

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00430.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Andersen, S. Th. 1979 03 01: Brown earth and podzol: soil genesis illuminated by microfossil analysis.Boreas, Vol. 8, pp. 59–73. Oslo. ISSN 0300–9483.Pollen and other plant microfossils were studied in soil profiles from aFagus‐Quercus petraeawoodland in eastern Jutland, Denmark. Fungal hypha fragments in the soil show characteristic length frequency distributions, which indicate comminution by large arthropods and microarthropods (Oribatei) during the burial. Distribution of the hypha fragments within the podzol indicates development from a former brown earth. The pollen sequence in a humus deposit reflects recent vegetational development. Modification of pollen assemblages in the mineral soils can be explained by mixing during burial by soil fauna. Development from brown earth to podzoloid and podzol follows the models assumed by pedologists. The various stages are related to vegetational changes and the processes were completed within a few hundred

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00431.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00432.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00433.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY