168 THE DEVONIAN AND CARBONIFEROUS. [bull. 80. 



carboniferous is according to the proposal of Alexander Winchell in 1870, 

 (see ante, p. 135). The " Marshall formation v is also according to the 

 classification proposed by Alexander Winchell. As the whole Carbon- 

 iferous and all of the Devonian except beds with a very meager fauna 

 are wanting in Minnesota and the author does not explain the reasons 

 for his departures from ordinary usage, it is useless to make further com- 

 ment. 



In 1873 two reports 1 were published upon the geology of Missouri, 

 under the directorship of Mr. Raphael Pumpelly. 



In the first of these reports the work consists of material previously 

 unpublished, mainly details of county surveys made before 1861, the 

 maps and charts having been struck off prior to 1861. Pages 1 to 110 

 are by G. C. Broadhead, 111 to 188 by F. B. Meek, and 189 to 323 by B. 

 F. Shumard. The nomenclature is substantially the same as that of the 

 first and second reports of Gt. O. Swallow, 1855. 



In Mr. Shuuiard's report on Sainte Genevieve County, 2 a classification 

 is given which deserves attention. 



Opposite page 292 is an engraved chart entitled "Vertical section of 

 strata observed in Sainte Genevieve County, by B. F. Shumard." 



The part of this chart referring to the present discussion is as fol- 

 lows: 



a 



GO 



3 

 O 

 Fh 



'2 



o 



U 



CS 



O 



e. Coal Measures. 



Feet. 



Hard siliceous li mestone 10 



Dark purple and drab shale 25-40 



Micaceous sandstone 30 



Archimedes limestone or Kaskaskia limestone 200 



Sandstone i 80 



Archimedes limestone 50 



St. Louis limestone 150 



Oolitic limestone 20 



Archimedes limestone or Warsaw limestone 80-100 



t. Encrinital limestone 200-300 



o 

 21 

 "3 

 o 



© 

 Q 



Chemung 

 group. 



j. Chouteau limestone 90 



k. Vermicular sandstone and shale 25-30 



I. Sandstone 25 



p. Hamilton 25 



m. Oriskany 



As explained in the text, the upper Archimedes limestone (h) is the 

 equivalent of HalPs " Kaskaskia limestone; n the " Sandstone " (/) is 

 the " Ferruginous sandstone " of the earlier reports. 



1 lteports on the geological survey of the State of Missouri, 1855-1871, hy G. C. Broadhead, P. B. 

 Meek, and B. F. Shumard, published by authority of the legislature, under the direction of the Bureau 

 of Geology aud Mines, pp. 323, and index, 1873. 



Preliminary report on the iron ores and coal fields from the field work of 1872. Part I, pp. 1-218, 

 part II, pp. 1-402, bound in one volume. Raphael Pumpelly, director. 1873. 



Part II. Geology of Northwestern Missouri, by G. C. Broadhead, and of Lincoln County, by Wm. 

 B. Potter. 



'Pages 292-293. 



