LOBECK, NEW YORK CITY, A PHYSIOGRAPHIC CENTER 23 



The teacher of physiography placed in New York with a knowledge 

 of the principles of the subject but not having a speaking acquaintance 

 with the regional physiography of this area would proceed to enlighten 

 himself in this respect in some such manner as follows: He would ar- 

 range a series of excursions which might be classified, according to the 

 length of time necessary, as half-day excursions, full-day excursions, 

 week-end trips consuming one day and one night, two days and one 

 night, two days and two nights, three days and two nights, and finally 

 more extended trips of a week or so, and perhaps a vacation jaunt over 

 the whole district. 



Suppose we outline a few of these and suggest briefly the main points 

 of interest in each case, as well as the literature which he would look 

 over before going into the field, and the maps and notes which he would 

 take with him. 



*- ^ A* j. Second ' Mto. 



Cove Mrn. l ^-A*..4A-*^-»*uau*4^4,^ 



Peters Mtn. 



Third Mh 





Fig. 20. — View upstream from the summit of Blue Mountain at the 

 Susquehanna Water Gap 



Showing the even-crested ridges and the hroad valley floors with their intrenched streams 



Half-Day Trips 



Staten Island. — The first half-day of freedom would find our explorer 

 on his way to Staten Island armed with a topographic and geologic map 

 of the region and perhaps somes notes gleaned from a perusal of Folios 

 83 and 157 of the Geological Survey. He probably has looked over 

 Hollick's (182) paper on Staten Island drift. The contrast between 

 glaciated and non-glaciated areas, the difference in soil, pre-glacial ero- 

 sion, the terminal moraine, its knob and kettle topography, the character 

 of the drift and source of the material are some of the topics which 

 would engage his attention. 



Palisades. — A second opportunity for a half-day's trip will result in a 

 study of the Palisades (Fig. 14), going by way of Fort Lee and returning 

 by way of the Dyckman Street Ferry. As usual, topographic and geologic 

 maps should be taken. Folio 83 and the New Jersey State Geological 



