fyf' COWA' ACADKMV OF Sf'TV.N'CF.S; 



1 2*. I () to 20 it. Liruest<Mie yellosv and l>i-ay ( F/isiJi/ia')^ 



KL T) ft. Clays. 



14, tit. Yollowisli iiTcofoereixt saiid. 



If., 10 to 12 ft. Limes^tone. 



l(y. 2r)ft. (ireeni.sh :ui4 chocoLnte'cLiy* alvovcaiKi shalcs 

 Ik'low. 



449 ta4*H>ft. Total tWekifOS&. 



Th'is is a rathc^r surprisina- vesult^ after nv havr Twnni ac- 

 ■fustomed to rcfei'inn-g- only 200 loct t«.> tb^^ u]>per rari)oiii- 

 ferousv as^ estimated by Dr. White. Some *vf this may l?c con- 

 sidered somewlKit doubtful stilK but at k^jist )>')(> f(^et is 

 deniaixled by facts, as we sIkiU set\ 'lliie nlo^st frequently 

 exposed meml)ei"s of tbe sertes are th(^ upper ami Imrer beds- 

 of liniestooe, Nos-. 8 aiKl lo, which,, frrnu their relation to the 

 clays and sniKi,, are especially apt to form benches', cliCs and 

 li-ock-h ousels. It is the upper of these whiick bas furnished 

 the most sloue m qmirries as at South Bend, Weepini>- Water., 

 Bennett and lloca, iu N("braska. and S!ia\\Vai?d Wilson's, in; 

 lo\va. The saudstoue 12 to 1 .> feet IndofW tlse liuicstcvne was- 

 f()n:^idered by Dr. White to lix' tls;' lowest stratum ev[>osed iui 

 southwestern Iowa. Several years residence in t!ie re^-idiu 

 and uuiiierous observations of many c.vposures which were 

 not accessible to Meek and Whit(^. have- UhI the writer t<v 

 conclude: 



First. That thirty to fifty feet of sti-ata [«'I<)^v the saicf 

 sandstone are exposed in the vicinity of Paciiic .lunction, as 

 also at Plattsjuouth. 



SccomL That the saiKlst<?ne wijii-h Xh. White (fis<'overcd 

 south of Fremont City is not the ecjuivalent of the said sand- 

 stone in the lower part (»f Wilson's Q,uaiTy. as he inferred. 

 ( White's Geol. \^>l. 1, /// loc. ), luit is of a considerable hiirher 

 g'eoloorical hori/.on. This is shown by the following- facts. 



y\:) Although the two sandstone strata may be traced at 

 nearly the same level within a half a mile of each other, yet 

 their associated strata are entirely different. One is No. 2, 



