1. From Luke TeinaUc.iiniiig K,"\V_ 

 j Lake Huron, 150 miles. 



j" Conglomerate of q 

 ! and quartz pobbl 



uirtz, with jasper 

 and pale sea- 



I Quart/iie. 

 L green. 



1 Qiiiiri/.iH', allernating with 

 | Slalc?, I'hluiitic and siliceous. 



Conglomerate, like Die oue below, 



Limestone, pebbly. 



Conglomerate, slaty, with boulders 



2. North shorn of Georgian Bay; 

 from Collins Inlet, weal waixh 70 in ili-«"? 



Feet. 



Greenstone 700 



(■Jiiai'l/.il<-r-,iinl,, Tm . m ie 1 



withred jasper pebbles... \ 1000 

 Qniu'l.'ilc. \ihitish-grey ... ] 



Q.uurt/ile, alternating with 1 Rnn 



Slates, blue or black / ouu 



Couglo me rate-slate 800 



Limestone (very long) 250 



Conglomerate-slate 1000 



Quart/.ile. pale green 1 ]2 00 



Slales. given argillaceous ... J 



Greenstone 400 



Slates, chloritic 1000 



6850 



Plutonic intrusions very frequent. 



Superior, 



Feet. 



Qimrl /.it e. white 400 



Limestone, like that, below ... 200 

 Q.uartzite. white, mottled ... 150 

 Limestone, green, grey, and 



clierty; red sandstone at 



the bottom 400 



Quart/he, white, massive ... 2,970 

 Conglomerate of white quartz; 



red jasper uml other pebbles 2,150 

 IHorite. ullcniatiiig with... ) 

 Q.uarf/.ite, iron - stained, I 2,300 



ripple-marks, &e J 



Conglomerate, like the one 



above 3,000 



Linaslone, grey and green; 



greatly disturbed 300 



Diorite, alternating with .. 

 Conglomerate-slate, argil 



laeeous, with boulders of 



gneiss, syenite, jasper, 



quartz 



Diorite 1 ,. 



Quartzite - eon - L 8 " 6 ™ 1 - 



glomerate J natmg. f 1,000 



Quartzite, white, vitreous 



Trap, inlcrslraliiiert "1 - „. 



Elates, epidotie, eliloritic ... j AW0 



£CC 



16,650 



^sljvnif confusion; two great faults, 

 ■r iutonic invasions very frequent. 



Uppek Hubosiak of Logan. 



Upper Group, 



Sandstones, red and white, with 



calcareous shales: Imp inter^r-i 

 titled. l miersira 



Limestone, reddish- white, 120 feet 

 band-tones, conglomeratic, with red 

 jasper pebbles and limestones in- 

 termixed. 

 Grit, white, with jasper pebbles. 

 Veins numerous, containing ores of 



copper. 

 Dykes of diorite, syenite, and por 



pbyry, abundant. 

 Trap, amygdaloidal and columnar. 



Quartzite, slaty and conglomeratic 

 containing pebbles of jasper and 



Slate,, like No. 7. 



Quartzite. 



Mica- si ate. 



Diorite, alternating with 



Slate, dark grey, and green. 



_ 3. South shore ; between Lakes Supe- 

 rior and Michigan. ( See l.\,.., ir liml 

 Wlutney, op. dt p. 19.) 



Lower Group. 



Slates alternating with sandstone 



ana limestone. 

 Chert and Dolomite, with specks of 



Anthracite. 

 Conglomerate, green, with jasper 

 ^ and quartz pebbles. 

 Trap, in conformable bands, on 

 several horizons. 



This series of beds is unconform- 

 able to those enumerated in the next 

 column, and is copper-bearing. Ac- 

 $S" S t0 ~ E "6 elmann (Foster and 

 , Whitner, Geol. Lake Superior, Land , 

 I District) and Dr. Emmons, the series 

 may bo considered to exist in Arkansas 

 ind .New York. 



Potsihnu Sandstone, transgress! ve 

 Conglomerate, quartzosc, with 



'['""■''-pebbles. 

 Slaie. silieeous; Nuvaculite. 



Slate, chloritic. 



Trap, hornblendic and felspathic 



bearing Potsdam Sandstone in 



denuded spots. 

 Trap-dykes, frequent. 



4. Same region 1 



Limestone, crystalline; 01 

 horizons, with elay-slale. 



Magnetic and specular 

 with white quartz. 



Hornblende-rock, compact. 

 Slates, chloritic, talcose. 

 Quarlzite, felspathic. 

 (■I'anite. intrusive. 



True succession of the beds 

 Quartzite or quartz-slate, grey 

 splintery, talcose, &c., in thick 



Mica-schist, quartzoso. 



Gneiss, fine-grained. 



Horn s tone. 



Hornstone - porphyry passing into 



jasper. 

 Male* r-hloritie, talcose, &C. 

 Limestone, granular, alternating with 

 '■nci.-s, i|iiartzose. 

 Diorite, I(HIII-l'.-,ikj feet thick, 

 t "i, glomerate, with quartzosc peb- 

 bles of red jasper, quartz, and 



Schists, chloritic, with small beds of 



Lyilian stone. 

 Conglomerate, quartzoso, with peb- 

 bles of Lydian stone and white 

 quartz. 

 Sandstone, 



Schist, micaceous, argillaceo-talcose. 

 Gneiss. 



Granite, schistose. 

 The 2nd, 3rd, and 4th beds alternate 

 with one another, and arc traversed by 

 quartzosc porphyry. 



