anal ee ee ee a ee ee 
COPPER-BEARING ROCKS OF LAKE SUPERIOR PL.xxIx 
CAL SURVEY 
UNITED STATES GEOLOG' 
Through Burlingtén Bay and Atkins Lake 
rials Aaa ees UPERIOR Western. Sandstone : 
ro Athin’s Lake 
i Heweenuw series, upper division Keweenaw serves Huronian meee, pranite 
lower ivisconyiion bearing ronasy - os 
Heweenawan sertes, lower dv 
m's Island. 
Stocktons 7” le 
E s oe we a | tee Western Sandstone 5 x , 
POE Dai == x S.28° E 
<= c Peres 
Through Two Island River andj the east end of Stockto 
> Hevenaw serves, upper division 
Kewenay pistks,, te ete 
aries, Huronian G 
ness, granite ele 
lower duision (Tren bearing series) “ 
Two Island River 
G A K 
Keweenaw series, lower duiswon 
(naire, granile ade. Huroran 
be (Anmikte group ) 
Through mouth of Brule River and Ontonagon. 
Ont 
eg Cr Mare trap range “ 
S.26°E 
Basten sandstone 
R 
E 
ee 
U 
Ss 
Huronian 
Aron bearing series 
Brule River 
} L 
Heweenaw series, lower dwiston 
Keweenaw series, upper division 
lower divisor 
Keweenaw’ series, 
* te cle: Huronan 
Gneiss, J Animikie group | 
W 
Through Pie Island and mouth of Eagle River. 
Eastern sandstone 
Eagle Ru: 
R KEWEENAW 
POINT 
Muronian 
Gneass, qrante ete 
ISLE 
SUPE RT 0 R? ROYALE a S 
Murontian 
Tron bearing series) 
k " A us 
Keweenaw series, lower duvision 
LAKE 
| THUNDER, pp, ja 
ei par 1 eee 
Heweenaw serves, Upper division 
Keweenaw serves 
lower duis. 
Huronian 
{ Anamilete group.) 
\) 
North and south Uwough Mt. Houghton. 
Eastern sandstone 
KEWEENAW, 
R a ePOUN TN al a7 A K Wy J C P 
Huronwan Gness, granite ete 
Aron. bearing series 
division 
dwision , 
Keweenaw sertes, lower 
ISLE 
IGNACE « L 
upper 
| NIIMGON BAY | st 
Teween aw Serwes, 
lower dwision 
Hewvecnaw sees, 
VE 
Helde Be 
group 
LGA 
south through Mien p: 
chipicoten Island . 
Lover: 
Trenton. and Gneumnate 
North and 
E 
Maynestan 
groups 
Muronian 
Iron bearing serias) 
Keweenaw serves 
lower dzvesion 
A oon sos te 
yeries, Upper 
Havenaw 
3ENE -)) GEOLOGICAL SECTIO , 
soo or Li 
Scale 500000 OF 
