150 



The Lowee Cretaceous Floras oe the World 



by a cold winter, nor are there any known deciduous forms/ While the 

 data are not conclusive it seems certain that the Potomac climate was 

 considerably warmer than that of to-day, with much less change from 



Fig. 1. — Sketcli map of the world showing the approximate location of 

 outcrops containing Lower Cretaceous Plants. 



Potomac Group (Patuxent, Arundel, Patapsco formations), Maryland-Virginia area. 



Glen Rose beds (Trinity Group), Texas area. 



Black Hills area (Lakota, Puson formations). 



Kootanie area, Montana, British Columbia. 



Lower Cretaceous, Queen Charlotte Islands. 



Shasta area 'Upper Knoxville and Horsetown beds). 



Mexico (Neocomian). 



Peru (Neocomian). 



Kome beds, Greenland. 



Spitzbergen (possibly of Jurassic age). 



Southern England ( Wealden. Barremian, Aptian, Albian) and Belgium (Bernissartian). 



Germany (Wealden, Aptian). 



Portugal (Neocomian, Barremian, Aptian. Albian). 



Prance (Neocomian, Barremian, Aptian, Albian). 



Switzerland (Neocomian, Aptian) and Italy (scaly clays of Emilia). 



Austria Hungary (Barremian). 



Klin Sandstone ("Barremian). 



Uitenhage series. 



Southwest China (Neocomian). 



Japan (Neocomian). * 



season to season, and with a very long growing period. The rainfall must 

 have been ample and fairly well distributed, and the indications point 

 to a rather high percentage of humidity throughout the major portion of 



^ Laricopsis and certain cycadophytes such as Zamites and Podozamites 

 may be exceptions to this statement. 



