580° EL BALIN, PAN LD ARNG ELAO NA RED, 
given by him with the general section published by White* shows 
a great similarity in the character of the beds, and parts of his 
section even show a general similarity of sequence. The section 
given by White was based largely upon investigations carried on 
along the Raccoon River in central Iowa, a region recently 
restudied by the present Iowa survey. The section made out 
in the course of the present work is much the same as a portion 
of that earlier published. There are, however, certain changes 
of importance. The upper part as originally published? is essen- 
tially as given below, the original section numbers being 
retained. 
Feet 
44. Arenaceous shale and sandstone, = Z = IO 
43. Bituminous shale, - : = s z Sal 
42. Lonsdale coal, - - : : = 2 : 2 
41. Shales, light and blue, - - - - - 4 18 
40. Limestone, - = : : < ‘ : 
39. Shales, light red, blue, arenaceous, - - = BX6) 
38. Limestone, impure, dark blue, - - - : 2 
37. Bituminous shale and coal, - - : - 2o5 8 
36. Shales, yellow and blue, - : 3 - = 5 
35. Sandstone, - 2 = = : S 2 5 oe 
34. Shales arenaceous, yellow and blue, - = = 16 
33. Marshall coal, : E 2 2 p m z= ly 
32. Shales, blue and yellow, - = = = . 8 
31. Limestone, impure, fragmentary, bluish buff, - 2 
These beds vary more or less in thickness, but maintain the 
same sequence over a considerable area.3 The Lonsdale coal 
is still worked at the type locality and lies about thirty feet 
below the base of the Bethany limestone. The heavy sand- 
stone, No. 35, is well exposed and easily recognized. Below 
the section as given there is a sequence composed mainly of 
shales estimated to be about 150 feet thick. Below this in turn 
is a series almost identical with that just quoted, but in which 
* Geol. of Iowa, Vol. I, pp. 272, 1870. 
2 WHITE, loc. cit. 
3 Geol. Guthrie county, lowa, Geol. Suryv., VII, pp. 428-446, 1897; Geol. Madi- 
son county, zézd., pp. 504-509; Geol. Dallas county, zézd., VIII, pp. 78-82, 1898. 
