FOURTH REPORT — 1834. 



plain, together with an undefined portion of the part of the 

 great central plam of the continent which is connected with 

 the Mississippi. 



The northern limit of the tertiaries, so far as at present une- 

 quivocally ascertained, is in the south-eastern corner of New 

 Jersey, adjacent to the Delaware Bay. Here it appears to com- 

 pose the greater part of the counties of Cape May, Cumberland, 

 and the south-west corner of Salem. From that point it is be- 

 lieved to extend almost continuously through the eastern por- 

 tions of Delaware, Maryland, Virginia, and North Carolina, and 

 in interrupted patches further south through South Carolina, 

 Georgia, Alabama, and Mississippi into Louisiana, and the ter- 

 ritory west of the Mississippi river. 



The following arrangement will show the range, as far as hi- 

 therto discovered, of the tertiary and recent formations of this 

 country. 



Synoptical Table of Recent and Tertiary Formations of the 

 United States. 



