(') The American Geologist. July. 189:? 
pari of the science. Items tribute to the keenness of his obser- 
vation and to the good judgment with which his comparisons 
were made. 
His first extended publication upon stratigraphieal geology- 
was the report upon work done in California and Oregon dur- 
ing is.")."), formingpart of Pacific R. R. Reports, vol. vi. Tins 
contains descriptive note- of the region traversed; a discus- 
sion of the character and age of the coals found on Vancou- 
ver and the coast of Oregon: the coal- of Bellinghani hay and 
Coose hay in Oregon are referred to the Miocene, owing to the 
close resemblance of their flora to that of the Upper Missouri 
lignitic series, whereas those of the Vancouver group are placed 
in the Cretaceous because of the fauna, despite the Tertiary 
facies of the flora. The glacial geology receives a fair share 
of attention and suggestions are offered to explain the disap- 
pearance of glaciers from that region. 
The Colorado river report* was much more important, as 
the author had very little to distract attention from his proper 
work. The expedition began its work near the mouth of the 
Colorado and followed that stream by boat, and afterwards by 
meander on shore for nearly five hundred miles, after which 
the river was left behind and the party marched eastward 
across Arizona and New Mexico to Fort Defiance, where tin- 
expedition was disbanded: but Dr. Newberry was enabled to 
continue his studies eastward to Fort Leavenworth. Kansas, 
then almost the outlying post of civilization. Among the 
noteworthy features of this report are the sections of the Col- 
orado canon: the correlation of the Lower Cretaceous of Ari- 
zona and New Mexico with that of the Upper Missouri region : 
the impartial revision of work done during previous explora- 
tions in portions of the region crossed : and the recognition at 
Las Vegas, New Mexico, of the upper members of the Upper 
Missouri Cretaceous. The report contains a careful discus- 
sion of the causes producing the plateau region topography 
and canon system, all the salient features being regarded as 
due to the action of running water. The extent of tin- conti- 
nental area at various periods is considered and the conclusion 
*Report upon the Colorado river of the West. Explored in 1857 and 
185S, by Lieut. Joseph C. Ives. Washington. 1861. Part in. Geologi- 
cal Report by Dr. J. S. Newberry, geologist to the expedition; Ito. pp. 
154, () plates. 
