APPENDIX—GEOLOGICAL SURVEY. 
405 
in the Galena limestone, mostly in the upper portion of this 
formation, with the blue limestone underlying it all the way. 
Shall we now abandon our mineral resources (as we are more 
than likely to do, unless some special effort be made to revive 
our drooping mining interests), and leave these half-developed 
mines to future generations ? Will they not be apt to give us 
a place in the scale of civilization not much in advance of that 
race from whose hands we but a few years ago received these 
lands with the mines partially opened. 
Putting together these simple facts, such as fissures and 
groups of fissures; ranges, and groups of ranges ; districts, 
and groups of districts, all of which are related, we have this 
well-defined mineral belt as a fact; from which as a standpoint 
we are now prepared to examine a higher class of facts to 
which this belongs. 
Looking north, we observe in the distance other mining dis¬ 
tricts apparently arranged along a similar line. On reaching 
town three, and following its south line west to where it inter¬ 
sects the Mississippi, we notice very similar phenomena to that 
described in the belt just referred to. Let us put down a stake 
here also, and measure four or five miles north and put down 
another, and from these two stakes draw two lines as before, 
east or a little to the north of east, and see what we include. 
We have the mines of' Potosi, British Hollow, Rockville, Pin 
Hook, Red Dog, Whig and Platteville, in Grant county. In 
extending into La Fayette county, this mineral range encoun¬ 
ters the elevated lands of the Platte Mounds, and but little is 
seen of it until we reach Calamine, Fayette and Argyle, where 
it may be seen as a mineral belt extending into Green county, 
where to, like the other, it is lost in range seven. What was said 
of the other belt may be said to a great extent of this; only 
that it is not quite so productive perhaps, as a whole. 
With the additional light of this fact, it is not difficult now 
to see another belt near the south line of town five. A belt, 
which though well defined through three ranges of townships 
in Iowa county, and one in Grant, (including the mines of 
Mineral Point, Diamond Grove, Lost Grove and Mifflin, in 
