CONTROLLED EUROPEAN FRACTURE FIELDS 



159 



"If here it be brought into consideration how closely the rocks are inter- 

 sected by quite small dislocations, it follows in fact that a section of country 

 cut up in this manner is built up as though out of separate squared stones," 



From the southern shore of the Baltic a study of the fault system has 

 shown the dominance of the northwest-southeast and northeast-southwest 

 directions, corresponding, as we shall see, to the arrangement farther to 

 the westward '.^^ 



"If from this description we derive a general view, we see that the entire 

 northern portion of Hiddensoe, the Dornbusch, is intersected network fashion 

 by fissures. These fractures allow us to make out two principal directions 

 according to which they take their course. These are, in general, the direction 

 northeast-southwest on the one hand and northwest-southeast on the other. 

 Along these clefts we see the Pleistocene formation fall in in blocks." 



Figure 32. — Fault 



in the Silurian Basin of Central Bohemia 



The full and dotted lines are faults and the shaded lines porphyry dikes. 

 J. Krejci and K. Feistmantel) 



(After 



The maps published by Daubree in his classical work illustrating the 

 control of waterways b}'^ joints, and taken more especially from districts 

 in northern and central France, bring out the same diagonal directions 

 and the intermediate cardinal ones (see figure 31).^^ 



Again, the scenically famous Saxon Switzerland may be cited, wherQ 

 the "Quader" (squared stone) sandstone is so perfectly blocked out by 

 joints that it stands up in high mural faces with projecting squared hut- 



's A. Gtinther : Die DIslokationen auf Hiddensoe, Friedliinder. 

 eoDaubree: Loc. cit., pp. 332-375, pis. 3-6. 



Berlin, p. 58. 



