TODD— ON Kol.DfNi. oF (. AKT.OSl KKRdUS >lK.\r.\ IN 1 U \. ,)».» 



"5i\ adjaccnl l(ic:!)il ics. 'JMiis iDav We liur c.tiuiiariMJ wit ii iconic 

 vciricms, hul Jhc inorc ircrjiu'iit exposures <»f the pnvscut tiinr. 

 •make it cjiiitc possible to sliow tkat Xko strata liavc fair pcr- 

 sistcuco, and Winy lie traced secores of inilcs, \>\ tiicir lilholo- 

 .'^ical jiiid stratiLrraphical ckaraotcrs alone. 



A fairly complete section wf the rweks (♦! >oiith\N oteni 

 Iowa !,!iay he f^njnd l-t; placing- in (WTler the section at Wyo- 

 ining, t !ie s(>ct i(M) at .Xelsraska ('ity, \i'ith Croxlon"- l>oriiig-, 

 ii'ifh^ Uaydet>"s FinaJ Report.. Nehraska, pjk 101. KMI). the 

 sections at )\'ils(Mj's, ( ^\'hite^s Report om Jowa, \'ol. I, p. v>')(S)^ 

 the sectjou at Rock IJliitF, and the section holow Plattsmouth-, 

 (Ilaydeu's I\ei)ort). (iiviui^ this in hi-.ief foi'U), on)itt ini'- t])e 

 ;riner rletails w<' have the followinu-,- 



SKCTK^N OF > ri'KI," ( W i;i'.(*MrKi:< »r S 1;(K'KS in SOl rinNKSTKltN 

 IOWA. 



1, IS to 11) H. Blue, red and ash colored clays, with two 

 ilistiiut layers of jinH'sloue J i'v.ot and 4 feet in thickness 

 -i-es[)ecti>ely. 



2. 10 ft. Yellowif-h, mieaceon.s, soft stindstone. 



o. ol' ft. Drah, ash, lead c<)k)red and chocolate colored 

 <<'la\s, with only one thin hiyer of l»luish limestone. 



4. 1-2 ft. Limestone in thin layers^ light yellow and gray» 



.">. IS') ft. Thin layers, mostly of gray shades, though 

 red and blue v)ccur, with five thin beds of limestone and four 

 of sandstone. (This is derived only from Cr(»xton's iKjring 

 :;ind is (piite indefinite both as to its real character and as to 

 its relation to observed sections). 



li. 12 ft. Hluish limestone, inter-strati tied with i)lack 

 sliades and with nearly one foot of fair coal near its center. 



7. ."{Oft. Drab elavs. enchjsing tlwee distinct shades of 

 linicstoHc. i> to 4 feet thick. 



s. 20 to 24 ft. Compact linHv-tonc. tljin bed(l(Mi and sty- 

 lolitic mor(^ or less. 



11. li to 12 ft. Dral) ciavs carbonaceous in iwd ln)ii/ons 

 and c(»utaiuinii- twct t!iin strata of limestone. 



10. 12 to 2.") ft. Soft, tine-grained, yellow sandstone. 



11. ;>.") to 4.") ft. (lays and slates, bluish and gray, con- 

 laininn .'> (U' f stiata of limestone, one much the thickest. 

 soiuet iuies 7 feet tiiick. 



