412 SCIENCE PROGRESS 



to a very thick overlying rock cover, or the underlying shales 

 must have been more disturbed. The process must have 

 happened in the fracture zone of the crust and not in the 

 deeper zone of fluxion. Hence if Dr. Holmquist's view be found 

 correct, and could be extended by further mapping to Jemtland, 

 it would simplify the explanation of the crustal movements, 

 and would still leave the Scandinavian overthrust the greatest 

 yet discovered. 



The Scottish and Scandinavian overthrusts are accompanied 

 by many of the same phenomena. The most significant difference 

 is that the movements took place in opposite directions ; in 

 Scotland the rocks above the thrust planes were pushed west- 

 ward ; in Scandinavia they travelled eastward. The disturbances 

 were therefore doubtless due to changes in the land that occupied 

 the area between the Scandinavian High Fells and the North- 

 West Highlands of Scotland. The thrusts, on both sides, were 

 outwards towards the depressions that probably existed in the 

 Baltic region and off the western coast of Scotland. 



'&)' 



Supplementary Note on the Literature 



In addition to the literature cited in the text reference may be 

 made to the following. Full bibliographies of the earlier literature 

 are given by Tornebohm in his Grutiddragen, 1896, pp. 202-5, 

 and by Hogbom in his Monograph on Jemtland, 1894, pp. 100-3. 



A short summary of the literature on the investigations 

 of 1868-71 is given by Tornebohm, "Till historiken ofver de 

 geologiska undersokningarna i Sveriges fjalltrakter," Gcol. Foren. 

 Forhandl. vol. vii. 1885, pp. 669-73. 



A summary is given by Prof Hogbom in the third sec- 

 tion of his paper, " Sur la tectonique et I'Orographie de la 

 Scandinavie," Annales Geogr. vol. xi. 1902, pp. 122-33, P^- "^'• 



The course of the overthrust line in Sweden is marked on 

 the geological map of Sweden on the scale of i to 1,500,000, 

 issued by the Swedish Geological Survey in 1901. 



Many of the memoirs quoted from the Afhandlingar of 

 the Geological Survey of Sweden were also published in the 

 Fovhandlingar of the Geological Society of Stockholm. 



