Geology and Mineralogy. 145 
diately” sounds quick to one who appreciates the slowness of geo- 
logical changes. The Carboniferous age was very long; and some 
where in that part of geological time, either before the age had 
im 
fully ended, or some time after its close, the epoch of catas- 
trophe began. But this catastrophe, according to the apprehen- 
Sion of geologists who best appreciate the of the earth’s 
of the Upper Missouri Country ; by F. B. Meex. 609 pp. quarto, 
With an Introduction of Ixiv pages, and 45 quarto lithographic 
plates, of about 1000 figures, constituting volume ix of the Report 
of the U. S. Geological Survey of the Territories, F. V. Hayprn, 
-o. Geologist in charge.—Mr. Meek’s labors in connection with 
