244 



GEOLOGT. 



val's map of them in his Geological Survey of Connecti- 

 cut. The eruptions of trap are not wholly confined to 

 Triassic rocks, but appear to some extent on either side 

 of the area occupied by them, making ridges and dikes 

 among the other rocks. 



Fig. 144 



349. Plants of the Jurassic Period. The climate of the 



