摘要:

The 1978 Uppsala Symposium was organized as ageste d'honneurto the memory of Otto Torell and his Ice‐Age Theory, published a little more than a hundred years ago. The Symposium opened with a lecture on the development of the Ice‐Age Theory, then four regional surveys of our present knowledge of the deglaciation pattern and chronology yielded new and somewhat controversial ideas about the melting of the Scandinavian Continental Ice, and more than forty individual research reports showed the dynamic scientific situation in Quaternary Geology in Norden. The Symposium and this issue ofBoreasform part of the joint Nordic activity within the IGCP project entitled ‘Quaternary Glaciations in the Northern Hemisp

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00787.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

The age and correlation of marginal moraines in Norway is discussed. A tentative location of the ice margin 15,000 B.P. is suggested, as well as a more firmly based location of the 10,000 B.P. ice margin. The results are preliminary and based partly on observations by the field parties of the I.G.C.P. project Quaternary Glaciations in the Northern Hemisphere'.

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00788.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Because of its well‐developed ice‐marginal zones, SW Sweden is an important reference area for the study of deglaciation, chronology and palaeoclimate 13,500‐10,000 B.P. The ice‐marginal zones are described and defined. Earlier research and opinions concerning the deglaciation are summarized. Based on radiocarbon dates from shells, vertebrate bones and limnic sediments, a revised deglaciation chronology is presented. This chronology is supported by biostratigraphic transects of time‐space diagrams. The radiocarbon and varve chronologies are compared. Some ice‐marginal zones are supposed to be 400 to 900 years older than expected from the varve chronology. The deglaciation chronology is correlated within the southern margin of the Scandinavian inland ice. Various consequences for the interpretation of glacial dynamics, shoreline displacement, and the biological environment ar

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00789.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Thinning of the ice sheet took place by two different processes ‐ by the melting of ice over the whole or part of the surface and by the outflow of ice from the central parts of the ice body. A simulation model should therefore include both types of processes. A first draft of a model for the melting is presented, together with some notes about other parts of a complete, complex model for the thinning of the ic

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00790.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Recent kineto‐stratigraphic studies (Berthelsen,Bull. Geol. Soc. Denm. 27, 1978) indicate repeated advances and recessions and a correspondingly complex pattern of deglaciation. From mainly morphological studies Marcussen (Danm. Geol. Unders. II: 110. 1977) advocates that only one Weichselian advance (from N and NE) occurred. Two of his key areas are discussed. His deglaciation model involves the formation of successively lower plains during the late Middle Weichselian due to glaciofluvial and ablation processes. It is shown that this model must be abandoned, because its implications contradict its basic assumption

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00791.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

In a region of generally thin Holocene sediment cover along the outer Norwegian continental margin, a 565 cm long piston core was taken, which contained more than 4 m of Holocene clayey silty sediments. A several decimetres thick sandy horizon separated the glacial marine clays with ice‐dropped components and the fine‐grained Holocene sediments which have bulk sedimentation rates of more than 40 cm/1000 years. The scarcity of biogenous sediment components in the glacial sediments and the increasing frequency of benthonic as well as planktonic fossils in the Holocene deposits points to important changes in the Norwegian Sea hydrography during the time of the Scandinavian deglaciat

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00792.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Distribution, thickness, lithology and stratigraphy of varved clays are discussed. The sediments were deposited in the Baltic Ice Lake during the Late Weichselian.

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00793.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Results obtained by mapping and special varved clay investigation show that the so‐called Northeastern ice advance (13,500 B.P.) and the Low Baltic readvance (13,000–13,200 B.P.) are separated by a significant deglaciation phase, for which we propose ‘Lockarp Interstadial’ (13,200‐13,500 B.P.) as a time‐stratigraphic term to be used in the type area of southwes

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00794.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

The Getsjö area of Kolmärden is located within the Swedish terminal moraines. The pollen diagrams reflect a Younger Dryas flora. Some radiocarbon dates have been obtained from the oldest sediment with some organic matter. Diatom profiles show the Baltic Ice Lake diatom flor

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00795.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY

摘要:

Deglaciation processes within different rock relief types are discussed. The lower parts of the fissure‐valley landscape in western Sweden were covered by the late‐glacial sea at deglaciation, while the rock plateaux between the valleys formed an arctic archipelago. The glacial movements, deposition activity and recession were intimately dependent on the variations of the topography and on the buoyancy of the seawater in the valleys. The opinion that a piedmont glaciation existed in eastern Halland during the deglaciation stage has been corroborated concerning areas above the marine limit. In the valleys below this limit the ice margin, however, was straight or slightly concave. The western part of the South Swedish Highland, situated high above the marine limit, is characterized by a zonal deglaciation; zone by zone of the ice margin was detached from the actively moving ice and became immobile. Subglacially formed eskers appear together with glaciofluvial deltas which formed extramarginally in ice‐dammed lakes. The moraine forms are often dominated by 1–2 km long drumlins with rock cores. Where the ice diverged over a convex bedrock basement, Rogen‐like moraine ridges, radial as well as transverse, were formed during the deglaciation stage when the ice was s

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1979.tb00796.x

出版商:Blackwell Publishing Ltd    

年代:1979

数据来源: WILEY