208 



expansion, stands a hill or butte 100 feet liiixii. of oval outline with diam- 

 eters of one-(iuarter and three-eii?hts of a mile. (Fig. 10.) It is of sand- 

 stone up to SO feet and the eastern lialf is cai)ped with 20 feet of boulder 

 clay. The whole arrangement is very suggestive of the ileo-caeeal junction 

 of the intestine, in which the l)ntte ]»lays the part of the valve. On the 

 west the expanded valley is bounded by a cur\ed ridge, through which the 

 Raccoon passes by a gorge l.orM* feet wide between sandstone bluffs 40 feet 

 high. (Fig. 11.) At the village of MansHeld the gorge ends and the valley 

 expands abrujitly to one mile. In its nudst. .just below Mansfield, stands a 



Fi^'urc 10. LppiT Mansfield Hutte. 

 second bnltc somewhat siiiallci' than the one jirevionsly dcscfibcd. CO fe.-t 

 liigh. its lower hall of sandstone, its ujJiK'r of glacial day t'lill of large 

 boulders. ( Fig. llV i 



Tlie mile-wide valley lloor continncs live miles to P.ridgeton. (Fig. ;!li). 

 where it narrows to less than a ([uarter of a mile, being jiinched Ity a 

 terrace on the south side, half a mile wide and two nnles long. In the 

 stream bed and base of the terrace uii to ■'i~> feet a soft gray micaceous 

 sandstone is exposed in thin beds dipjiing to the south. (Mi the edge of the 

 terrace an isolated mound of alluvial sand and gravel rises to ."ii> feet. 



