-ON KOl.DINc; OK CAKItoNlKI KOrs STKAI A IN loWA. 



»;i 



the other No. 11. 'I'lic loi'iuci- is tlu- sMiulstoiic in tin- Nc- 

 braskii City iiiid XN'vominir !^cc'ti()iis, tlio hitlci- tii.it in tlir 

 Codiir HliifV and Rock lilutr soi^tions, on the Xchraska side. 



(-2.) At doiics" Point, just ahovc tlic junction of tlic 

 W('Oi)in«>: AVator with the Missouri, there is a fine expanse, 

 which seems to Irave escaped Meek and Ilaydcn. It shows 

 a dip of four to five deo-i-(.('s to tlie soutli-southeast, which cai-- 

 ri(\s over lOD feet of strata, whi'.-h are expos-d as the sunnnit 

 of an anticlinal, shown about a mile north, entirely below 

 the level of the river, in less than that distance. 



(.").) Tile hio-host limestone in Croxton's boring" at all 

 comparable with stratum S, is that of Xos. H4 and /i"), {ride 

 Ilayden's Final lieport, Nebraska, p. 10(5 ), 200 feet below the 

 surface of the Missouri. As this stratmn has been quite con- 

 stant for twelve to lifteen miles east and west, it may fairly 

 pi-esumed to be so to this distance south, and makino- fair 

 aHowance for the oI)scurities of Ijoianuf records we may con- 

 sider the identification (juite probable if not demonstrated. 



(4.) 'J'akini^- the l)()tt()m of stratum <S as our plane of ref- 

 erence, we find a hiirh anticlinal axis in the vicinity of Platts- 

 mouth on the Missouri, and a little east of AVeeping ^^'ate^• 

 town, on the stream of that name, and a lower one more 

 clearly exposed one and one-fourth miles above Jones' Point 

 on the Nebraska side of the Missouri, and a little south of 

 Wilson's on the Iowa side of the valley. The sharp fold im- 

 mediately south of the latter which has been noted at Jones' 

 Point may become a fault south of AVilson's. 



The position of the bottom of stratum <S is illustrated con- 

 cisely in the followiuiif table: 



Altitude of limestone above Missouri Ri 

 Distance in miles south of Omaha 



35-? 140. 103. 

 S.|8. M.|.. 



.90 -.50 -200. -225 

 .26 .27 .30 35. 



