254 F. REPORT OF PROGRESS. E. W. CLAYPOLE. 



The Clinton group, (V.) 



The various beds of this group form no small part of the 

 surface rock in Madison township. Their northern is sep- 

 arated from their southern outcrop by the intervening com- 

 pound synclinal belt of limestone occupying the middle of 

 the township. The various divisions of the group are the 

 same as those given in the account of Saville township. 



5. The Sand-rock ore bed. 



4. The Ore sand-rock \ FPP er ' f> ffc ' 

 ( Lower, hard. 



3. The Upper Olive shale. 

 2. The Iron sandstone. 

 1. The Lower Olive shale. 



Fossil ore group. 



The Clinton lower shale is well exposed on the road over 

 Conecocheague from Buffalo mill to Sandy hill, where it is 

 brought up by the axis of Conecocheague and not concealed 

 beneath masses of the wreckage of the Medina sandstone as 

 is the case on the slopes of Tuscarora. At this part of the 

 anticline the mountain consists entirely, so far as its top 

 and slopes are concerned, of the Clinton group as defined 

 above and the red and variegated shales which overlie them. 



The Iron sandstone rising on the Conecocheague anti- 

 cline forms terraces on the north and south slopes of the 

 mountain which are much encumbered with the Hat red 

 plates of this durable rock. The outcrop is of especial in- 

 terest, however, for having afforded the fossils of which an 

 account will be found in the volume on the palaeontology 

 and also in the appendix. 



The Iron sandstone seems to thicken rapidly in this town- 

 ship. Its wreckage and terrace at Run gap are both incon- 

 spicuous but both become evident at a short distance west 

 of the gap and in Conecocheague are strongly marked. The 

 upper olive shale is not well exposed but may be found at 

 some places along the slopes of Conecocheague and betrays 

 itself by the color of the soil. 



Loose fragments of the Ore sand-rock are also abundant 

 in the same place but the rock does not, so far as I am 

 aware, occur in position. Some of its beds here are very 

 fossiliferous. 



