458 REVIEWS—GEOLOGICAL SURVEY OF CANADA. 
excavation has been made in a eross-eut, running S. 45 E., which is at right angles 
to the strike. The depth excavated is from four to eight feet, and the following 
is the succession of masses met with in the cross-cut, given in a descending order, 
and reduced to vertical thickness from horizontal measurement : 
Feet. 
1, Limestone; this may be a boulder deeply sunk in the soil, but it is sup- 
posed to be in piace, and to belong to one of the isolated masses of the 
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Concealed ....... cose een vevecaeveesesces wirainsstplsiGiet ike «iv aeioe Ae Bop oo | 3s 
Limestone in place, belonging to one of the isolated masses; small irregu- 
lar spots of the pyritous sulphuret of copper occur in the ee This is 
probably part of the same mass as the first three feet, and the concealed 
three feet would also be a part, making the whole eight feet.......... 2 
2. Variegated sulphuret of copper, enclosing numerous angular fragments of 
limestone in irregular aggregations. This mass dipped with the stratifi- 
cation, but thinned out, and terminated downwards ........ menace 
3. Limestone broken into various sized angular fragments, by a number of 
reticulating cracks of from one quarter of an inch to three inches in 
width, and filled with variegated sulphuret of copper, with spots of 
white crystalline cale spar, and occasional crystals of transparent quartz. 15 
4. Breccia or conglomerate, with a paste composed of variegated and vi 
treous sulphurets of copper, mingled with fine grained silicious matter, 
enclosing fragments of limestone, some angular and some rounded ; 
some of them almost wholly ealeareous, and others largely silicious, 
The sulphurets of copper run in parallel clouded streaks, the clouded 
character being occasioned by the presence of more or less silicious 
matter, mingled with the steel-grey and the purple of the two sul- 
AGI ooossobopooon eicintrsimertate 0 Biateieehin ab abee lit tbl ua veh nN 4 
5. Limestone......... eusneWeveaeshsiewsuepaval ees hens Wiiiieing end ak eSe Roadie 2 
6. Copper breccia or Deer nies of the same characters as before...... 4 
Tc APAIMICSUOME, se, shecehabal lista. che cleiictbeuaitaleas vote love dats slihalet ov speetaterade nail SWAN BRES eA SEO 
8. Slate, with traces of copper (green carbonate on the surface) peegcon recy | die 
9 Serpentine-lice stock: (si.jsyure oie! aiaie\ovefayot= @) stalstens ata hd conensvehexsboieiapsiseeka ly een 14 
10. Siate, with traces of copper (green carbonate on the surface)..... Bea 3 cy tis 
eet esas 
“The thickness of fifteen feet given to the brecciated limestone of No 2 is de- 
duced from a horizontal measurement of ten yards across the strike, and a sup- 
posed slope of thirty degrees, which is about the dip of the bed and of the strata 
where it can be made out in the vicinity. But no clear indication of bedding is 
visible in the body of the breccia, and as the excavation across it is yet only two 
feet deep, it may hereafter be proved that, by some irregularity, the slope is less 
than thirty degrees; in that case the thickness would have to be reduced in 
proportion to the diminution of the slope. If the slope should be eighteen de- 
grees, the thickness will be ten feet. 
“ The two breceia or conglomerate beds,j numbered 4 and 6, contain the great 
