ACCEPTANCE OF LOCAL BASIN HYPOTHESIS 



141 



affecting the growth of opinion about the Newark is the fact that the 

 numerous areas are geographic units and extend through a considerable 

 number of states. Because of this the detailed study of the system has 

 been undertaken by different geologists belonging to the several state 

 surveys or to different divisions of the U. S. Geological Survey, and 

 they have each studied 6ne area or a portion of an area only. 



Reconsideration of Problem favored by recent Monographs 



The " correlation paper " on the Newark system published in 1892 

 by the U. S. Geological Survey was the first serious attempt to correlate 

 the work of the different areas. Since the appearance of that paper 



cupied 



IE 



EWARK SYSTEM 



BASED ON MAPS BY I C RUSSELL 

 Scale 



Figure 1.— Area occupied by the Newark System. 



much more detailed study has been given to a number of the important 

 areas. Moreover, the principles of structural geology, which have been 

 strongly emphasized in the American work of the last decade, have been 

 applied with success to the solution of the local problems. 



The last three years have seen the appearance of no less than five 

 final reports treating in much detail the geology of the areas from New 



