APPENDIX—GEOLOGICAL SURVEY. 
403 
are familiar) that our ore deposits are invariably connected 
with fissures. Standing for a moment on this fact, and look¬ 
ing around the circle which it illuminates, I see another fact. 
This fissure is only one of a group of parallel fissures from 
five to ten feet apart, called by the miners a range. And with¬ 
in this illuminated circle there is still another fact, that there 
is an indisputable relation between this group of fissures and 
the ore deposit. 
In the combined light of these facts our range of vision is 
considerably enlarged. We see now that this single group of 
fissures (or range) is only one of a group of ranges extending 
every way, and forming what is called a mining district. In 
the center of this district the ranges are near each other and 
rich, but as we extend away fiom the center the ranges become' 
scarcer and not so rich. But now away on the horizon of our 
vision another fact appears, and in its light we can see that 
this group of ranges, or mining district, is bounded on the east,, 
west, north and south by barren ground. 
By the concentration of the light of these facts, the range ot 
our vision is widening, and we see now coming into view be¬ 
yond this barren ground other and apparently similar mining 
districts, as though they were arranged in an east and west 
line. If this is a fact, it is an important one, and a new discov¬ 
ery. But before we accept it as a fact let us submit it to a 
rigid test. , 
To do this let us go to the southwest corner of the state 
where these mining districts commence and drive down a stake 
at Fairplay, and another four or five miles to the north, at 
Jamestown. And now let us draw two lines from these stakes 
east, or a little to the north of east, to range seven, in Green 
county. Now let us carefully look along within these lines, 
and see what we can find. We have within these lines the 
mines of Fairplay, Jamestown, Hazel Green, Benton, New 
Diggings and Shullsburg. Extending east from Shullsburg, 
no very important deposit of ore is found until we reach the 
east side of the west Peccatonica, where w 7 e find Wyota, on the 
