摘要:

In the Archean of North Sweden occur terrestrial and marine sediments of roughly equivalent age. Their distribution is used to demonstrate the distribution of land and sea at that time.

ISSN:0016-786X    

DOI:10.1080/11035895909449171

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449172

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

Bentonite beds are described from a number of localities on Gotland, all in the oldest exposed Silurian beds (Upper Llandovery). Four beds are found, with characteristic intervals. They occur in beds which were supposed to belong to two zones, and it is suggested that the zones are partly facies (more or less calcareous) of the same age. A correlation with bentonites in Västergötland is suggested.

ISSN:0016-786X    

DOI:10.1080/11035895909449173

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449174

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449175

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449176

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

A method of measuring the particle size distribution in clays using photo-sedimentation is first described and the importance of such knowledge for the understanding of the flow properties of clay slips is illustrated.

ISSN:0016-786X    

DOI:10.1080/11035895909449177

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449178

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

摘要:

This paper deals mainly with methodical aspects of particle size determinations, viz. principal idéas and design of differential and bidifferential sedimentation balances. The differential balance operates with two sedimentation pans at slightly different heights in the suspension. The difference in load on the pans is simply related to the cumulated curve. The second one operates with three pans under the same condition and is actually a condensed form of a four pan arrangement and it gives directly the size-frequency distribution. The deviation of the balance is at present electro-magnetically compensated by hand since a proper recorder is not yet available or constructed. By a special device “the inherent error” in mechanical analysis is eliminated. Some results are discussed with respect to other methods and to the stability of the sol. — The construction is further improved.

ISSN:0016-786X    

DOI:10.1080/11035895909449179

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor

ISSN:0016-786X    

DOI:10.1080/11035895909449180

出版商:Taylor & Francis Group    

年代:1959

数据来源: Taylor