8o WARREN DUPRE SMITH AND EARL L. PACKARD 



the problems involved. The writers are personally acquainted with 

 much of the field and have made up for some of the deficiencies 

 in their own knowledge by drawing upon the literature which they 

 have deemed most reliable. In some cases, as will be indicated in 

 the proper places, they have taken issue with earlier workers. 



A few scattered references to the geology of Oregon in the earhest 

 reports of various kinds are mainly of historic interest, but natur- 

 ally at that time could not throw much light on problems of Oregon 

 geology. 



Dr. Thomas Condon, formerly a missionary, who came to 

 Oregon in 1852, and who because of an unquenchable love and 

 aptitude for natural history became a geologist, was the pioneer 

 geologist of this state. His popular book on Oregon Geology and 

 his collections, the first to be made in the now famous John Day 

 basin, and the general stimulus he gave to later workers are his 

 contributions, and no one has left a finer legacy to present-day 

 workers. 



In his published contributions Dr. Josiah Diller, veteran geolo- 

 gist of the United States Geological Survey, takes the lead. His 

 work began in 1883 and he has since covered most of western Ore- 

 gon. After Diller comes I. C. Russell, to whom we are indebted 

 for much of our knowledge of southeastern Oregon. 



The Oregon Bureau of Mines and Geology, created by legis- 

 lative act in 191 2, has contributed several important results of 

 investigations, more especially relating to the economic aspect of 

 the subject, and this Bureau has given financial assistance to other 

 work which has not appeared in its publications. The Bureau 

 maintains offices and a display collection of ores in Portland and 

 issues monthly The Mineral Resources of Oregon. 



The chief contribution to our knowledge of the Blue Mountain 

 region of eastern Oregon has been made by Waldemar Lindgren. 



Not the least important among the groups of investigators of 

 Oregon geology is the department of paleontology of the Uni- 

 versity of California, which has devoted its attention largely to the 

 fossil beds of eastern Oregon. 



The University of Oregon, represented by a line of workers such 

 as Ellen Condon McCornack, daughter of Dr. Condon, Chester 



