Maryland Geological Survey 185 



C Angoumian (from Angoulgme, Coquand, 1858) (= Provencian) 

 TURONIAN J Ligebiax (from the Loire basin, Coquand, 1858) (= Saumubian, 

 I Grossouvre). 



PFTsTOMANTAN f Sometimes divided into an upper Caretonian and a lower 

 Rhotomagian substage (Coquand, 1858). 



The European Upper Cretaceous is divided into two provinces — the 

 Northern and the Mediterranean, and in recent years the minor fauna] 

 facies have been worked out in the greatest detail, especially in France. 



In the discussion of Lower Cretaceous floras (op. cit.) it was found 

 feasible to discuss them by stages. There are, however, so many debatable 

 florules in the Upper Cretaceous and the literature is so much more 

 voluminous that a similar treatment would be more confusing than 

 serviceable. For example, the celebrated Aachen sands are considered 

 Santonian by some continental authorities, while others regard them as 

 basal Campanian. The same question arises in connection with the 

 equally celebrated plant beds of the so-called subhercynian Cretaceous and 

 other illustrations might be given to show that a chronologic treatment, 

 such as sufficed for the Lower Cretaceous, would prove much less service- 

 able than a discussion by regions which facilitates the introduction of 

 more stratigraphic notes, keeps the literature well grouped in the order 

 of its development, and in no wise diminishes the value of the lists for 

 purposes of correlation. Certain references to geologic literature and 

 comments on local stratigraphic relations of foreign areas are introduced 

 for the benefit of American students. Similarly, discussion of the very 

 extensive Upper Cretaceous floras of the United States is very much 

 reduced, since it would enlarge this chapter out of all proportion to its 

 value, and furthermore this data can readily be obtained by anyone having 

 access to the official geologic publications of this country. 



North America 



greenland 



Few regions within the Arctic Circle have been studied by geologists 



and paleontologists as thoroughly as the region including Disko Island 



and the Nugsuak Peninsula. Beginning with Inglefield's third Arctic 



