190 



THE GEOLOGICAL HISTORY OF PLANTS. 



able beds of coal, probably of this age, also exist in China, 

 India, and South Africa ; and jet, which is so extensively 

 used for ornament, is principally derived from the car- 

 bonised remains of the old Mesozoic pines. 



In the next chapter we have to study a revolution in 

 vegetable life most striking and unique, in the advent of 

 the forest-trees of strictly modern types. 



NOTE TO CHAPTER V. 



I append to this chapter a table showing the plant-bearing series 

 of the Cretaceous and Laramie of North America, from a paper in 

 " Trans. R. S. C," 1885, which see for further details: 



(In Descending Order.) 



Periods. 



Floras and subfloras. 



References. 



Transition 

 Eocene to 

 Cretaceous. 



Upper Laramie or Porcu- 

 pine Hill. Fort Union 

 group, U. S. territory. 





r Platanus beds of Souris River and 

 Calgary. Report of Geol. Sur- 

 vey of Canada for 1879, and Me- 



, moir of 1885. 



Upper 

 Cretaceous 

 (Danian and 

 Senonian). 



Middle Laramie or Willow 

 Creek beds. 



Lower Laramie or St. 

 Mary River. 



Fox Hill series 



Fort Pierre series 



Belly River 



Coal measures of Nanai- 

 mo, B.C., probably here. 



1 



r Lemna and Pistia beds of bad lands 

 of 49th parallel, Red Deer River, 

 &c, with lignites. Report 49th 



L Parallel and Memoir of 1885. 



iarine. 



Marine. 



1 Sequoia and Brasenia beds of S. 

 Saskatchewan, Belly River, &c M 



' with lignites. Memoir of 1885. 

 Memoir of 1883. Many dicotyle- 

 dons, palms, &c. 



Middle Creta- 

 ceous (Tu- 

 ronian and 

 Cenomani- 

 an). 



Dunvegan series of Peace 

 River. Dakota group, 

 U. S. Amboy clays, 

 U. S. 



Mill Creek beds of Rocky 

 Mountains. 





Memoir of 1883. Many dicotyle- 

 dons, cycads, &c. 



Dicotyledonous leaves, similar to 

 Dakota group of the U. S. Me- 

 moir of 1885. 



Lower Creta- 

 ceous (Ne- 

 ocomian. 

 &c). 



Suskwa River beds and 

 Queen Charlotte Island 

 coal series. Intermedi- 

 ate beds of Rocky 

 Mountains. Potomac 

 series of Virginia. 



Kootanie series of Rocky 

 Mountains. 



] 



\ 



Cycads, pines, a few dicotyledons. 

 - Report Geol. Survey. Memoir 

 of 1885. 



Cycads, pines, and ferns. Memoir 



of 1885. 



