424 FIRST YEAR SCIENCE 



a residual height like Mt. Monadnock which has not 

 been fully reduced. 



Although the general features of such a country are 

 those of hills and valleys and it has little of the appear- 

 ance of a plain as one passes over it, yet it will be found 

 that the uplands have a general uniformity of elevation. 

 Such an area is called a peneplain. The residual mountains 



THE MATTERHORN. 



which rise above the general level of the country and of 

 which Monadnock is a sample have been named monadnocks. 

 This is simply a name for a mountain left above a region 

 which has been cut down by erosion to an irregular plain. 

 200. Mountain Peaks. In mountain regions the features 

 which are often most impressive are the serrated peaks 

 which rise above the main mass of the mountains. The 

 shapes of these peaks vary greatly in different mountain 

 regions and tend to give individuality to the mountains. 



