TRIASSIC PERIOD. 



415 



Section 1. — Triassic Period. 



As already stated, the Triassic strata are always unconformable 

 with the Coal, and the period opens with a fauna and flora wholly and 

 strikingly different from the preceding. In some places, however, 

 there is found an intermediate series, the Permian, sometimes con- 

 formable with the Coal and unconformable with the Trias, sometimes 

 conformable with the Trias and unconformable with the Coal. Its fauna 

 and flora are also to some extent intermediate, though more nearly al- 

 lied to those of the Coal. The explanation of this has already been given. 



Subdivisions. — The subdivisions of the Triassic rocks and period in 

 several countries are given below : 



German. 



French. 



English. 



3. Keuper. 



2. Muschelkalk. 



1. Bunter Sandstein. 



Marne irisee. 

 Muschelkalk. 

 Gres bigarre. 



Variegated marl. 



Wanting. 



Upper New Red sandstone. 



Fig. 600. 



Figs. 598-600.— Triassic Conifers and Cycads (after Nicholson): 598. Voltzia heterophyll* 

 conifer. 599. Pterophyllura Jaegeri, a cycad. 600. Podozamites Emrnonsi, a cycad. 



