326 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
the phonolite and breccia and to turn northeasterly. Beyond this turn it becomes 
increasingly difficult to follow. As the Mary McKinney lode loses in distinctness 
another lode, lying east of it, becomes prominent. This is the No. 2 vein, striking 
generally N. 20° E. Unlike the Mary McKinney, it dips easterly, the angle ranging 
from 80° to 85°. The lode continues northward under the Howard flat into the 
Anaconda mine, and is there known as the Anaconda vein. The farthest point 
south to which the No. 2 vein has been followed is on level 5, about 500 feet south 
of the Burke and Fry shaft. In a general way its importance diminishes as the 
Mary McKinney lode west of it becomes more regular and distinct. 
Linking the No. 2 lode with the Mary McKinney lode is the No. 1 vein. This 
is a rather irregular and somewhat indistinct fissure zone striking northeast and 
dipping northwest at varying angles. It is not known to extend west of the Mary 
McKinney lode, though it apparently crosses the No. 2 lode. 
In addition to the lodes of meridional to northeasterlv trend, the mine contains a 
number of cross lodes. One of these, south of the shaft (fig. 32, p. 323), is known 
as the Jackpot vein though not the same as the productive lode of the Doctor- 
Jackpot mine. This strikes about N. 80° W. and dips north at an angle of about 50°. 
It is faulted by the Mary McKinney lode. The throw can scarcely exceed 10 or 15 
feet and the displacement corresponds to a reversed fault. About 100 feet and 250 
feet north of the main shaft the Mary McKinney and Le Clair lodes are crossed by 
two approximately vertical cross veins, striking N. 60° W. No displacement of 
any of the lodes can be discovered at the crossings. One of the most important 
cross veins in the mine is known as the No. 4 vein, and crosses the Mary McKinney 
No. 1 and No. 2 veins in the vicinity of the contact between the phonolite and the 
breccia. Tins lode strikes N. 31° W. and dips 85° SW. No perceptible faulting 
occurs at its intersections with the other lodes. About 300 feet northeast of the 
No. 4 lode is the parallel Black or Work vein, a persistent sheeted zone which is 
known also in the Anaconda mine and in the Ophelia t nnel. 
The northern part of the Mary McKinney mine contains a number of so-called 
“flat veins” with generally northerly dips of less than 45°. One of the most inter¬ 
esting of these is the Howard flat vein. Were it exposed at the surface this lode 
should outcrop about 150 feet south of the Burke and Fry shaft. It is cut in this 
shaft 150 feetsbelow the surface and dips about 30° N. It lies above the present 
accessible workings of the Mary McKinney mine, but can be well seen in the 
Anaconda and Ophelia workings. Two hundred feet vertically below the How¬ 
ard flat vein is the generally parallel No. 7 flat vein, which is well exposed on level 3, 
just north of the Burke and Fry shaft. About 200 feet below the No. 7 flat is the 
No. 3 flat vein, and about 40 feet below the latter is the No. 5 flat vein. Between 
the named members of this system of generally parallel flat veins dipping north 
at angles from 20° to 40° are a number of other fissures which have not been recog¬ 
nized as distinct lodes. The breccia in the northern part of the mine is thus charac¬ 
terized by well-marked parallel sheeting, the planes of this sheeting having a general 
northerty dip of about 30°. As a rule the nearly vertical fissure zones intersect 
this sheeting and the Howard basalt dike without appreciable faulting. In one 
case only was faulting observed. This was on level 3, where a small, unimportant 
vertical fissure faults the No. 7 flat vein with a throw of 4 or 5 inches. 
