Geology of Lake Superior. 37 
malachite was the most plentiful, but brown 
copper and earthy blue copper were also no- 
ticed. It was met with in fragments on the 
beaches of point Keewawonan,often associated 
with calespar. Doctor Bigsby found mala- 
chite in boulders of sienite, on the worth coast. 
These mustin all probabiiity be derived from 
the northern hills. 
As Mr. Thompson gave Doctor Bigsby a 
specimen of malachite, in which the ore was 
interspersed in thick coatings and plates, 
through a dark hornblende trap, it seems pro- 
bable that there is more than one locality of 
this mineral on point Keewawonan, probably 
not far apart. 
ORDER VI.—Baryte.—Straight Lamellar. 
Surpuare or Baryres.—Was found in a vein in greenstone, 
Fluor island—off western entrance 
to Neepigon bay. It was associated 
with fluor and calcareous spars. 
ORDER VIL.—Ualoide.x—Genus 1st Limestone. 
Ruome Span.—Found in a small vein in the chlorite slate of 
the slate islands. 
CALCSPAR, 
Reppisn, oneenisu AND Greyisu wnitre.— Occurs in veins 
in sienitic granite and greenstone, associated 
with quartz, felspar, chlorite, &c. In masses 
in porphyry and vesicular cavities and veins in 
amygdaloid. In the last rock it often forms 
whole balls coated with green earth, less free 
quently with zeolite, sometimes with qnartz. 
It occurs also in the cement of the conglome- 
rate of the old red sandstone, and sometimes 
traversing it in veins. 
Satiy Srsn.—Io veins in amygdaloid (Bigsby) 
Genus 
