768 



T. C. CHAMBERLIN 



purely subaqueous deposition. I should identify it as a typical 

 aggradation deposit of the ravine and basal-slope type where the 

 hillside environment was Carboniferous limestone and shale 

 mantled with loess. 



A few pebbles of drift and not a few pieces of charcoal were 

 found in the section, the latter at different horizons. Many land 

 shells and some additional bones were also found by Mr. Fowke, 

 but no unios. These interesting features will doubtless be 

 described in Professor Holmes's report. 



As had been anticipated, the excavations show that the 

 extent of the deposit is limited, and that it was penetrated by 



Fig. 13. — Cross-section from ravine at the left to truncated face overlooking the 

 Missouri bottoms (G) on the right. The section passes through the end of the original 

 tunnel ( T) at the place of the adult skeleton (S). It shows the supposed original 

 trench of the ravine in the surface of the limestone (A), the shale overlying the lime- 

 stone, developed in the cistern and in the extension of the tunnel (C), the limestone 

 blocks of the upper limestone under the house, and the deposit overlying the relics 

 (B). The line marked 100 feet represents the distance from the place of the skeleton 

 to the point where the truncated slope begins, not the whole length of the section. 



the tunnel nearly or quite at its greatest depth. Rock comes to 

 the surface just back of the house, and in the excavation for 

 the rear end of the house, Mr. Concannon informed me that he 

 reached rock which he thought was of the regular quarry kind. 

 In sinking for a cistern eighteen feet deep on the east side of the 

 house, he went through about four feet of dirt, then about two 

 feet of loose limestone blocks, and then about twelve feet of 

 "soapstone," so hard that he had to blast it. This is undoubt- 

 edly the Carboniferous shale encountered by Mr. Fowke in the 

 extension of the tunnel. This makes it clear that the spur on 

 which the house stands is formed mainly of Carboniferous beds 

 and is merely mantled with the silt and debris formations. The 

 accompanying cross-section is drawn approximately to a true 



