摘要:

The bedrock of the Eskilstuna region immediately to the south of Lake Mälaren (Fig. 1) belongs to a synclinorium within an old Archean range known as the Svecofennides. It comprises two supracrustal series, viz. the basal leptite-hälleflint series, which is mainly volcanic, and the overlying quartzite-graywacke-schist series. These are the oldest Svecofennian rocks encountered, and most of them have changed to gneisses, granite, and granodiorite during the Svecofennian orogenesis. The development of granite and granodiorite did not only involve granitizationsin situbut also implied large-scale homogeneizations and mobilizations often on addition of juvenile matter, mineralizers especially.

ISSN:0016-786X    

DOI:10.1080/11035896009455368

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

The author has studied the content of microfossils in a small quantity of shale from the Visingsö formation. One species of the familyLeiosphaeraceae, Protoleiosphaeridium wimanin. sp., is described. 13 species of sporomorphae, which are regarded as trilete spores and indicators of a terrestrial or semiterrestrial higher vegetation, have been recognized from the Visingsö formation as well as from the corresponding strata m the NW part of the Russian platform. Pellicles ofLaminariteshave also been encountered. The author correlates the Visingsö formation with the Gdovian andLaminaritesbeds in the Vendian series (complex) of the Sinian system, according to the terminology of Sokolov. These strata are further correlated with the Eocambrian Moelv sparagmite and Ekre shales in Norway.

ISSN:0016-786X    

DOI:10.1080/11035896009455369

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035896009455370

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035896009455371

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

Some points of view concerning the Swedish time scale are discussed, especially the new dating of the Finiglacial epoch. The investigation of Gothiglacial varved clay by the present author has up to now resulted in the determination of the time-limits of the Older Dryas, the Alleröd and the Younger Dryas Ages. Further information in a summery at the end of this paper.

ISSN:0016-786X    

DOI:10.1080/11035896009455372

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035896009455373

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

摘要:

Ernst Kraus: Die Entwicklungeschichte der Kontinente und Ozeane. Akademie Verlag Berlin 1959. 285 s., 99 textfig. Pris 35: — RM Reviewed by Gunnar Kautsky.

ISSN:0016-786X    

DOI:10.1080/11035896009455374

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035896009455375

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035896009455377

出版商:Taylor & Francis Group    

年代:1960

数据来源: Taylor