ilayden.] 



44 



[February 19, 



pyramids, and long ridge-like liills whicli show a vast amount of erosion. 

 Indeed tlie portion about Church Butes is precisely like the Manvaises- 

 terres or Bad Lands of White river.* 



FIG. 4. 



In a cut along the railroad nearly opposite to Church Butes there is a 

 bed formed of clay filled with small kidney shaped masses of fine bluish 

 clay, the whole filled with beautiful specimens of Unios, Paludinas and 

 other fresh water shells. There are also in the same cut layers of green- 

 ish clay much indurated, flesh colored concretionary and rusty drab 

 sandstone. 



About 6 miles west of Carter's Station a cut in the road reveals a 

 tough plastic dark gray clay, and at the top of the cut a bed of flinty 

 concretions fllled with small seams of chalcedony. The whole country 

 is paved with small water worn pebbles, mostly of opaque flint and some 

 of them exceeding 4 or 5 inches in diameter. Over a belt about 10 miles 

 wide from east to west and of unknown length from north to south, 

 there are the greatest quantities of moss agates. I am inclined to the 

 opinion that they originated in thin irregular seams in this recent ter- 

 tiary formation, probably somewhere south of Church Butes. The 

 origin of all this drift is evidently local and it is most probable that the 

 transporting power had its origin in the Utah mountains. These ter- 

 tiary beds are all nearly horizontal, inclining not more than 1° to 3°. 



At South Bend Station there is a layer of silicious limestone filled with 

 small Melanias, which are entirely changed into chalcedony. Some Unios 

 also occur. The bed below it is composed of ashen gray shale a little 

 arenaceous ; then comes a silico-calcareous layer. Above the shell seam 



* The geologist can compare the following illustration of the "Bad Lands" of White river, 

 Daltota, with Fig. 4, which is engraved from a photograph taken from nature, of Church Butes. 

 The peculiar features of the weathered hills in this region hear a striking resemblance to those on 

 White river. 



