VVFFCR-BEARING ROCKS OF LAKE 
R27w 
SUPERIOR PL, 
KEWEENA 
MICHI 
Scale vee'sss or lin ch SAST miles \ 
Contour lines 90 feet ¥ riical distance 
Topography compiled from US Lake Survey 
pd on “WS Land 0, 
emuiw Point 
dats 
Geology compiled by HD. g from maps 
and eure by Foster and Whitney, Williams, 
Stevens and Hill,and Pumphelly and Marvine, 
and from original observ Lionas. 
The Eastern Sandstone 
“Ligne 
KEWEENAW SERIES, 
UPPER DIVISION 
Red Sandstone 
Black Shale and Grey Sandstone 
Nonesuch Belt”! 
Red Sandstone and Conglomerate 
The Outer Conglomerate’ 
LOWER DIVISION 
Diabase and Diabase- amygdaloid, including 
at least one Conglomerate bell ; 
(*The Lakeshore Trap’ 
va. 
Red Sandstone and Conglomerate 
The Great Conglomerate 
Diabase and Diabase- amygdaloid, in luding several 
Sandstone belts Marvine's © Group C° of the 
Eagle River Section 
ive 
L 
Diabase and Diabase amygdaloid ine luding 
Conglomerates 
mottled Melaphyrsand coarse grained 
Lustre 
The Greenstone Group 
Gabbros and Jhabases 
amygdaloid and lustre mottled 
Diabase, Diabase 
of Conglomerate beds 
Melaphvr, urcluding a number 
Quarlz porphy rv and Felstle 
Diabase, Diabase amygdaloid. Melaphyt Diabase 
porphyry and Orthoclase gabbro,ineludin a alsa 
Conglomerale beds and beds orareas 0f Quarts porphyn 
Py Traverse Point ; a 
and Granitic porphyry Bohemian Range troup 
ere actually known to exist 
conglomerate belts wh ; j 
numbers guen them are 
inred lines, the 
pelly and Marvine 
ANarron 
are marked 
those used by Pum 
‘ 
Dip and Sirike 
Vines 
L fines of beological Cross seclion 
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