摘要:

Chlorinity variations have been determined vertically and horizontally in Postglacial clay sediments from the Ancylus and Littorina periods. The analyses were made by fusing the soil samples and by determining the Cl-contents. Comparative analyses were made by a leaching method. The factors influencing the chlorinity of sediments are discussed. The leachhg method gives lower Cl-contents than the fusing method. The vertical chlorinity variations of the sediments do not very well reflect the salinity variations in the Baltic during the period studied, as revealed by investigations of the diatoms of the sediments. Variatiom of the chlorinity within the same stratigraphic layer, with that same original Cl-content, may be due to differences in grain size and content of organic matter. The Cl-content alone of the sediments is not an adequate criterion of the paleosalinity.

ISSN:0016-786X    

DOI:10.1080/11035897209455394

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

Tills of different ages in SE Scania (Sweden) were shown to differ in their contents of clay minerals. The association of clay minerals complementary to erratics and grain-size analyses offer clues to the history of the different tills. The differences are a combination of quantitative and qualitative indicators. The locally derived tills show for instance relatively more kaolinite (and illite), whereas the Baltic Ice tills show more chlorite and a 11,5 Å mineral on which further investigations are under way.

ISSN:0016-786X    

DOI:10.1080/11035897209455395

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

The Quaternary geology of the area between Simrishamn and Skillinge (SE Scania) has been mapped and studied in detail.

ISSN:0016-786X    

DOI:10.1080/11035897209455396

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

The evolution of fleck gneiss and veined gneisses in the Västervik area is treated in view of ion activities and vapour fugacity. It seems probable that the latest recrystallization in the fleck gneiss depends on an increase inaK+causing a breakdown of porphyroblastic cordierite. The formation of some migmatites, on the other hand, may be due to a diastic rise in fH2O.

ISSN:0016-786X    

DOI:10.1080/11035897209455397

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

In order to extend the knowledge of the sandy sediments and to correlate such layers, the determination of the relative width of the grain projection is made. The method of making such micromeasurements and diagrams has earlier been published by the author (Hagerman, 1960). When dealing with material transported by water, the border conture of the plots of a given sediment converges towards a point located at the region of the coarsest grains. This point shows the ability of the transport medium to carry the grains even if the large grains have not been present.

ISSN:0016-786X    

DOI:10.1080/11035897209455398

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

Investigations of metabasites (i. e. metamorphic basic to intermediate rocks) from the Precambrian of Southeastern Sweden show that seven distinctly different periods of magmatic activity may be distinguished. Their relationship to sedimentation, intrusion of granites, metamorphism and tectonics is established. A scheme of the geological evolution can be pictured, leading to a better understanding of the geological processes in this area.

ISSN:0016-786X    

DOI:10.1080/11035897209455399

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

The Ordovician baltisphaerid nameBaltisphaeridium perpaucispinumis proposed as a replacement forBaltisphaeridium paucispinum, Kjellström, 1971.

ISSN:0016-786X    

DOI:10.1080/11035897209455400

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

The author takes part in theFårö Team Worksponsored by the Swedish Nature Conservancy Board. Architects, limnologist, botanical as well as zoological ecologists and geologist cooperate to find useful methods for Society's planning of the development of sparsely populated areas. The island of Fårö, north of the island of Gotland in the Baltic, is famous for its unique geological and botanical environment, and it has been chosen for the project.

ISSN:0016-786X    

DOI:10.1080/11035897209455401

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

Barth, T., Correns, C., Eskola, P.: Die Entstehung der Gesteine. Ein Lehrbuch der Petrogenese. 422 pp. Reprint. Springer-Verlag Berlin Heidelberg New York 1970. Pris 96 DM. Reviewed by Erik Åhman.

ISSN:0016-786X    

DOI:10.1080/11035897209455402

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035897209455403

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor