258 EXTINCT QUADRUPEDS. [CHAP. XXXIV. 



Kentucky, and Mill Creek, near Cincinnati, are of 

 geological celebrity, in consequence of the great 

 number of skeletons of extinct mammalia, such as 

 the megalonyx, mastodon, elephant, and others, which 

 seem to have lived, and have been mired in an 

 cient morasses, before the land began to sink; for 

 the great mass of fluviatile loam and gravel forming 

 the terraces, has been superimposed on the black 

 bog earth containing such bones. The teeth, how 

 ever, and bones of similar extinct quadrupeds, es 

 pecially the mastodon, are occasionally met with 

 scattered through the incumbent gravel and loam, so 

 that the same assemblage of quadrupeds continued 

 to inhabit the valleys while the first change of level 

 or the subsidence was going on. By simply extending 

 to the valley of the Mississippi, the theory before 

 applied to that of the Ohio, we may, as already stated 

 at p. 183. in reference to the Port Hudson bluffs, 

 account for the geological appearances seen in the 

 larger and more southern area. 



It has been long ascertained that in Norway and 

 Sweden a gradual rise of the land above the sea has 

 been going on for many centuries, producing an ap 

 parent fall in the waters of the adjoining ocean. The 

 rate of elevation increases as we proceed northwards 

 from Gothenburg to the North Cape, the two extre 

 mities of this line being distant more than a thousand 

 geographical miles from each other, and we know not 

 how much farther north or south the motion may be 

 prolonged under water. The rise of the land, which 

 is more than five feet in a hundred years at the North 

 Cape, gradually diminishes to d few inches in a cen- 



