390 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
dipping northwest, is encountered on levels 10 and 11 below the projection of the 
Buena Vista incline. The same intrusive body is probably met in the long crosscut 
FT. ABOVE SEA LEVEL 
10600 
-5 muggier incline 
Buena Vista incline 
I 
Surface 
tee shaft 
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V Co A' + + ' ~o- : o K ^ ' 
v \ /o ,* + n + 5V/& *+ 4 . + 
'"i/g *' *, * <- * -+■ ' \ + 
. /:£—J-.+ f / -t- * /+ + \ * ^ + 
t- \ -*■ / 
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0) 
> 
Leve/ // 
* ♦ -*■ + 
BRECCIA 
Q_ 
E 
(D 
O 
/* ♦ • 
/♦ + 
/«- •* 
"Z eve/ /4 
(under water) 
9200 
Breccia 
►' + n h 
,+\. 
Latite - phonolite 
Phonolite 
10,600 
- <0 
Fig. 45.—Longitudinal projection of the Buena Vista and Cheyenne veins of the Isabella mine. 
in the foot wall on level 10, 250 feet southeast of the collar of the Buena Vista 
incline, at the point where the Isabella basalt dike cuts through it. A third very 
large body of the same rock, with a prob¬ 
able flat southeasterly dip, begins a short 
distance northwest of the Maloney vein 
on level 11, and is also shown on level 
10 north of the crossing of Empire No. 2 
vein, which cuts through it for a long dis¬ 
tance. A very persistent but narrow 
dike of trachydolerite, called the Isa¬ 
bella dike, cuts through the workings 
between the Lee and Buena Vista shafts 
and is especially well exposed on level 
10 in a long crosscut in the foot wall. 
VEINS. 
The principal vein system trends N. 
40° W. and the fissures dip southwest 
at 60° or steeper. This system is crossed 
by several northeasterly trending veins. 
The most important and most continuous 
of the northwesterly trending veins is 
called the Buena Vista; from the upper workings this vein would seem to be con¬ 
tinuous with the East Victor vein, and it has been followed on several levels for 
Fig. 46.—Cross section of the Buena Vista and East veins at 
the Lee shaft, Isabella mine, looking northwest. 
/ 
