1 70 The Rocks of the John Day Valley. 



these ridges the closing annals of that remark- 

 able lake period of Central Oregon may be 

 read as in a book. The last facts noted there 

 are the records of the mammoth, the horse, 

 the ox and their contemporaries. 



We have thus attempted to give four or 

 five glimpses into the grand old panoramic 

 life record of the past in Central Oregon, suc- 

 cessive day-and-night glimpses of the past, 

 along the shores of a series of lakes that once 

 occupied the valley, now depressed, through 

 which meanders the John Day river. 



The first one of these views is characteris- 

 tic of the old marine life of the original sea. 

 bed. It is made up of a number of patches 

 of sea beach, strewn with shells, a tooth or 

 two of some extinct reptile, a vertebra of an- 

 other, and the marine record closes. The 

 shoals on which these marine remains lived 

 became elevated into the framework of the 

 future Oregon, while in the depressions be- 

 tween them her earliest historic records at 

 once began. Oregon's Eocene, Oregon's 



