McGee and Call — Loss of Des Moines, Iowa. 



lations, where there i 



Loss, ashen or bluish, containing loss-kindchen, tubelets and 

 fossils identical with those of No. 1, as well as cylindrical 

 concretions. Below it becomes silty, pulverulent, and 

 obscurely laminated parallel with the base; and fossils, 

 tubelets and loss-kindchen disappear within one or two 

 feet from its lower limit. Four feet. 



Vermilion-red clay, as in the following section. One foot. 

 This section, which is the typical loss-section of this part of 



xidation, and is not structural, though it generally fol- 

 lows the obscure lines of stratification which occasionally occur 

 in this deposit wherever it is found in Iowa. In no respect, 

 indeed, is the loss of this section distinguishable from that of 

 iiosures along the Missouri river, save perhaps in the 

 xe of its fossils. It has now stood in an absolutely 

 vertical wall for nearly two years, and has formed but a very 

 slight talus. The fauna is identical with that of the following 



-oss, ashen or light drab, compact, vertically cleft, and con- 

 taining loss-kindchen, tubelets and rare fossils above, 

 obscurely laminated, pulverulent, silty, iinfossiliferous and 

 with minute ochreous specks below. The laminae follow 

 the major undulations of the irregular base, but in part 

 pass through the minor projecting knobs of the subjacent 

 member; and a few lenticular <>r inv-ular masses of this 

 member occur intercalated within the loss. The principal 

 vertical cleavage planes of the loss pass through its basal 

 portion and into No. 2. 



