232 Scientific Intelligence. 



top about one foot of colorless and transparent salt, followed by 

 about lourfeen feet of salt sightly discolored in parts by an 

 ir, and then by lOf feet of per- 

 fectly white an. I trans],,, < :i ; s ,]t ot sinirul r purity. * rielm\ this, 

 aim -». \t.i tut ot nnk. such ,1s tl nr\ hit uhhtioutl ,,i Mlt, 

 nearly pure, hut clouded in parts from the presence of a little clay. 

 In concluding. { ,n,y call attention to some new points in the 

 geology of this salt deposit. Bv reference to the Geology of 

 Canada (ls-63) and the geological map. i; will he mm n 'that 

 h« has, oi tin Corn ium,,. «,, i'ppei \ el- 

 derberg limestone, which here rests directiv „;.,.,•, a i- 



i 

 J tw-1 e beds at tl sui mit of the Onoi ra, as this salt- 

 as been named. The ib.siliiin.us limestone 

 >trata known as the Lower Heidelberg « l,i,-h i„ N , v. V...-K are 

 ■• suit fonaationa.nl the < "omiferous. have 

 not with the exception of the water-lime, been recognized in 

 Western Ontario. The upper part of the Dnui,,!,,;, consists 

 —ante,, and the j,,wer of marls, often with gypsum 

 beds Analyses ot tluse rocks „11 he found in the Geology of 

 ■ ■■■■■:». S,mc of them yield excellent hy- 

 ' -• The uhole thickness () r {U \: friua.n.n on the 

 r is from 200 to :>oo feet, hut it increases greatly to 

 >wn by our section. These marls, which' are 

 mixtures ot c a\ v* n .. ., ., , s i; n carbonate of lime, are often yery 



" !i::*!'\!" \'.'\ t!,: . u . ,h "> , }l ^v. , ': ), Vi"- in . coramon 



founded them. r ' ^ W " B waKa 



A fact of much interest to the geologist is the 



j preva.,, «„ 



- stones, for about 180 feet, or t 

 -.29 ieet, abound in corals, chiefly species of F, ostites 

 [,'!'"" ', ' "' '* '* lirne.i n From tin ^ hict< it 



"l'»t she outer ocean, which at ti 



. 



« I daring the formation of the 

 -, < , e f c . ot ciolomite, when it again returned, depositing 

 mestone. (Geologists 

 ult of a further study of the organic 



•the Whole i 



"* this limestone, and 



w^r SO on b r£ i i ink ', n r i! " 8haft * ts ■ 



Tb. completed in less than two y ears, and may require 



