lo THE RARITAN FLORA. 



basis of its contained amber and lignite with the Bakic Tertiary 

 of Europe. 



The credit for the first definite recognition of the Cretaceous 

 age of any of the Coastal Plain deposits belongs to Vanuxem 

 and Morton. Together, in 1828, they published a paper in the 

 Journal of the Philadelphia Academy/ in which the Coastal 

 Plain deposits are classified as follows : 



Modern Alluvial. 



Ancient Alluvial. 



Tertiary. 



r Lignite. 

 Secondary | ^^^^^ 



Both Vanuxem and Morton published subsequent papers, but 

 their chief interest, however, centered in the fossil remains of the 

 Marl series, which they correlated with the Lower Chalk, or 

 Ferruginous Sand formation of Europe. 



In 1832 Conrad divided the Coastal Plain into six forma- 

 tions, i. e. : 



Alluvium. 

 Diluvium. 



Gravier Coquillier, of Brong. Crag (mouth of the Po- 

 tomac. ) 

 Upper Marine, or Upper Tertiary (Peninsula of Mary- 

 land, etc.) 

 Middle Tertiary, or London Clay and Calcaire grossier 



(Ft. Washington, Claiborne, etc.) 

 Lower Tertiary, or Plastic Clay (Bordentown, White 

 Hill, N. J.; Cape Sable, Md., etc.) 

 Lignite, pyrite and amber are mentioned from the Plastic 

 Clay form>ation. This was the first classification v/hich even 

 hinted at the true complexity of the Coastal Plain, and from 

 this time onward the latter has been treated not as a single, or, 

 at most, a few formations, but as a long series of deposits of 

 varied composition and age. 



In 1835- and again in 1842^ Morton set forth his views on 

 the classification of the Cretaceous, dividing it into an Upper, 



•Jour. Acad. Nat. Sci.. Phila., (I) Vol. 6 : 59-71. 182S (1829). 



'Amer. Jour. Sci. (I) Vol. 28: 276-278, 1835. 



'Jour. Acad. Nat. Sci. Phila. (I), Vol. 8: 207-227, 1842. 



