386 



RELATIVE AGES OF 



TABLE I. 



Showing the Relations of the Alluvial, Aqueous, Volcanic, and 

 Hypocjene Formations of different ages. 



Formations. 



Some of the Localities where the Formations occur. 



A. 



.,, . , ("Beds of existing rivers, &c., vol. ii. 

 1 ch. xiv. 



r ,., . f Coral reefs of the Pacific, vol. ii. 



\a. Marine. < , .- 



fBed of Lake Superior, &c., vol. i. 

 | ch. xiii. 



Volcanic Etna, Vesuvius, vol. i. ch. xix. xx. xxi. 



f Concealed ; foci of active volcanos, 

 1 vol. iii. ch. xxv. 

 f Concealed ; around the foci of active 

 \ volcanos, vol. iii. ch. xxvi. 



*. Freshwater. 





{ 

 a. 

 / 

 b. 



-D, , . 

 Plutonic. 



AT x v 



Metamorphic. 



