LOBECK, NEW YORK CITY, A PHYSIOGRAPHIC CENTER 



21 



Mountain in Vermont may be cited, although their present form is due 

 entirely to later erosion. In Lebanon County, Pennsylvania, Bunker 

 Hill appears to be an old volcanic neck. 



FIELD TEIPS 



Thus far our efforts have been given to illustrating the principles of 

 the subject of physiography. When the teacher conducts a class into 

 the field or when he undertakes a little more strenuous work there on 

 his own account he will find that all these examples which he has been 

 citing are not grouped there in that nice and orderly way according to 

 topics or following the arrangement of the text book. If he would profit 

 to the greatest extent from what can be seen in the field the investigator 



Western Upland 



Eastern Upland 







^af?r7*rz2^2 



Meriden /£% 



The salient fopoarapAic . leatures . 



o/ rhe? Menden reg/on 



Fig. 18. — Diagrammatic representation of the essential relief features of the southern 



Connecticut Valley 



The New England upland preserving the Cretaceous peneplane upon its resistant 

 crystalline rocks and the down-dropped series of Triassic strata with their interbedded 

 trap sheets forming parallel and more or less offsetting ridges as a result of faulting, 

 and also the divergent course of the Connecticut River across a portion of the upland, 

 are all clearly indicated. 



must be prepared not only to observe and study whatever features present 

 themselves, disregarding entirely the lack of order in which he finds 

 them, but he must also understand the relation which the different steps 

 in the history of the region bear to each other, so that be may grasp and 

 keep in mind, in some sort of coherent and logical order, all of the feat- 

 ures before him. In other words, he must knit together the different 

 threads of knowledge which he has heretofore been spinning independently 

 of each other into a fabric of complex pattern whose design will be mani- 

 fest onlv when seen in its entirety. 



