274 M. DE Bonnard'^s Notices^ S^c. 



In the plains situated on the N. and N. E. of the Hartz, 

 we almost immediately find the modern secondary forma- 

 tions; oil the W. and S. we observe more or less of the 

 ancient secondary formations; on the S.E., the general series 

 of these formations and those which follow them are de- 

 veloped in the Mansfeld country, so well described by M. 

 Freiesleben. It will be seen that the greater or less con- 

 tinuity or interruption in the general series of formations, 

 corresponds here very exactly with the less or greater steep- 

 ness of the slopes* 



