652 GEOLOGY OF THE YELLOWSTONE NATIONAL PARK. 



described. Holmes pointed out the fact, since abundantly confirmed, of 

 the succession of forests that have been entombed one above another. His 

 section of Amethyst Mountain shows clearly this remarkable phenomenon. 



In October, 1874, Dr. Otto Kuntze, a celebrated German botanist, then 

 on a botanical exploring journey around the world, visited the Park and 

 made some interesting observations on the process of petrifaction of trees 

 now going on in the vicinity of the geysers and hot springs. His paper 

 was not printed, however, until his return to Germany in 1880. 1 



The thorough exploitation of the Park was begun and carried on for 

 several years by the Yellowstone Park Division of the present Geological 

 Survey. In 1883 the work was extended toward the northeastern portion 

 of the Park, and collections of greater or less extent were made at many 

 places. In 1885 the Fossil Forest section was worked out, and large col- 

 lections were made by Mr. Arnold Hague, Mr. W. H. Weed, Mr. George M. 

 Wright, and Prof. J. P. Iddings. 



In the summer of 1887, Prof. Lester F. Ward and I spent about six 

 weeks in the vicinity of the Fossil Forest, making large collections of fossil 

 wood and leaf impressions. The exact localities are enumerated below. 



The following season I spent two months in the same area, discovering 

 many new beds of plants and more thoroughly exploring and collecting 

 from beds previously known. These are also recorded in the following list 

 of localities. 



LIST OF LOCALITIES AT WHICH FOSSIL PLANTS HAVE BEEN COLLECTED IN 

 THE YELLOWSTONE NATIONAL PARK. 



1871. 



Divide between the source of Snake River ami the southern shore of Yellowstone 

 Lake; Hayden survey. (Not since observed.) 



Near Yellowstone Lake, among basaltic rocks; Hayden survey. (Not since 

 found.) 



1872. 



Yellowstone River below mouth of Elk Creek; A. C. Peale, Joseph Savage, 

 and O. C. Sloane. 



1878. 



Amethyst Mountain in vicinity of Fossil Forest; W. H. Holmes. 



1 Das Ausluud, 1880, pp. 361-364, 390-393, 669-672, 684-689. 



