ISSN:0016-786X    

DOI:10.1080/11035897109451539

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A data file for geological field data has been constructed. Programmes of input, output, plotting and statistical treatment have been combined to a system called GEOMAP. The standard retrieval of GEOMAP includes a large number of lists and plotted maps of outcrops, rock types and single or combined tectonic parameters. Plotting of tectonic data in equal-area projections and rather advanced statistics are also included in the system. A new way of processing current text is introduced. GEOMAP has been tested in Scandinavian igneous and metamorphic terrains during the last two years.

ISSN:0016-786X    

DOI:10.1080/11035897109451540

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A staining method earlier described in this periodical has now been developed into a spray technique. The walls of the limestone quarry' at Limhamn have been examined with this method. Details, before not visible for the eye, have emerged to supply additional information concerning the stratigraphy and perhaps even the formation of flint and SiO2-rich limestone.

ISSN:0016-786X    

DOI:10.1080/11035897109451541

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A sequence of submerged peat in the southern part of Lake Vättern in Sweden has been investigated. The rate of soil formation is calculated. An approximate date of thePiceaimmigration to this region of 800 A. D. is given. The submergance of the peat is due to the overturning of the lake, caused by the irregular land upheaval. The northern parts of Lake Vättem show considerably greater land upheaval figures than the southern parts, thus turning over the lakes water to the south. The overturning effect can, according to two different methods of calculation, be estimated to some 17 cm or 9 cm per century.

ISSN:0016-786X    

DOI:10.1080/11035897109451542

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Over the past four years the Geological Survey of Sweden has been using specially trained dogs for searching for sulphide-bearing boulders in glacial moraine. This article gives some details of this activity.

ISSN:0016-786X    

DOI:10.1080/11035897109451543

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Hydrothermal experiments at 400°C and 400 bars indicate that a complete solid solution exists between BaSO4and BaCrO4, whereas in the binary systems BaCrO4—SrCrO4, BaCrO4—PbCrO4, SrSO4—SrCrO4, PbSO4—PbCrO4and (at 100°C, 1 bar) BaSO4—Ba(BF4)2large miscibility gaps exist. Diagrams show the extent of the solid solutions in the systems (Ba, Pb) (SO4, CrO4) and (Ba, Sr) (SO4, CrO4). Stability calculations indicate that most chromates are too unstable to be common minerals. Natural lead chromates (crocoite) are almost free of substitutions, supporting the conclusion above.

ISSN:0016-786X    

DOI:10.1080/11035897109451544

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Detailed investigations of metamorphism and migmatization in the northern archipelago of Misterhult, south of Västervik, SE Sweden, show that two main events can be distinguished:

ISSN:0016-786X    

DOI:10.1080/11035897109451545

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

A drilling at Sundet on the Southern shore of Lake Siljan (Fig. 1) ended 107.5 m below the surface without reaching the bedrock. Analyses of samples taken at regular intervals have shown the presence between, 72.5 m and 74.5 m of diamicton which covers glacio-fluvial deposits containing ground-water under pressure. In a later drilling at a place located 18 m east of the former a similar diamicton was penetrated between 74 m and 76.5 m before the glacio-fluvial deposits with ground-water were reached.

ISSN:0016-786X    

DOI:10.1080/11035897109451546

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Marine shell dates from the Kattegatt region give evidence of a climatic amelioration called the Ågård Interstadial, which is older than the Bölling Interstadial and younger than the Susaca Interstadial. The Ågård and Bölling Interstadials are separated by the Fjärås Stadial. Re-examination of available radiocarbon dates and correction of an earlier mistake lead to the following corrected chronology: 12,700 B. P.=onset of the Ågård Interstadial (no change), 12,400 B. P. = Ågård/Fjärås boundary (earlier 12,300-12,350 B. P.) and 12,350 B. P. = end of Fjärås Stadial (earlier 12,250-12,300 B. P.).

ISSN:0016-786X    

DOI:10.1080/11035897109451547

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Micropalacontological studies of samples from a supracrustal succession of the Vetlanda Series of South Sweden (> 1740 m.y.); i.e. Svecofennian in age, revealed the presence of a varied assemblage of microfossils. Some of the most representative organic bodies are described, and their origin is briefly discussed. The sedimentary nature of the fine-grained rocks is proved by its microfossil contents.

ISSN:0016-786X    

DOI:10.1080/11035897109451548

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor