48 GEOLOGICAL RECONNOISSANCE 
on township 20 north, range 18 east of the 5th principal meridian, at what 
is known as McCarty’s diggings; but the ore lies too close to the lower 
hard sandstone to give much prospect of productiveness in this rock. In 
the upper sections of the ridges, lying between these McCarty’s diggings 
and the New York location, amongst the magnesian limestones, more or 
less ore may be expected to occur; more especially, since pieces of “ float- 
mineral” have been found, at intervals, between the two locations. 
A vein of galena of several inches traverses the limestone forming the 
bed of Jennings’ creek, about one-and-a-half miles above the forks of 
that stream, at what is known as the “ Molton or Sewell diggings.” Here 
the course of the vein appears to be nearly north-west and south-east. 
Several shallow pits have also been sunk on the adjacent hill-side, where, 
I understand, small pieces of lead ore were discovered. The rock here, 
is a close-textured, cherty limestone, very irregular in its fracture and bed- 
ding, and is a member of the same formation in which the lead ore occurs 
on Sugar Loaf creek, but modified in its lithological character; since, at 
the latter locality, the limestone is an easily decomposing rock, weather- 
ing and splitting up like hydraulic limestone. The composition of this 
rock will be seen by the analysis in the Chemical Report. 
There is considerable variety in the lithological character of the differ- 
ent strata composing the hills in the lead region of Marion county, on the 
waters of Sugar Loaf creek, as may be seen by the following section, 
taken about half way between the Hudson farm and the head of Sugar 
Loaf creek. 
SECTION OF STRATA OF LOWER SILURIAN DATE ’ . 
IN THE LEAD REGION OF MARION COUNTY; WA-| It will be observed by 
TERS OF SUGAR LOAF CREEK. Per miesate 
the subjoined section, in 
als « [8 {the lead region of Marion 
o Io ae ee . : 
Fomel = |&|county, taken in the hills 
307) |_ca_cH adjacent to the head of 
—— Sugar Loaf creek, that 
cH CH Space concealed with fragments of chert, : 8 ; ; 
cH hornstone, and other varieties of flinty in the space of 307 feet 
“cu cu | Silic kg. . ‘ , ‘ 
ee a) eee of the section, considera- 
cH . . . 
ee tie a ble variation is observa-~ 
ble in the composition of 
the various beds of which 
it is made up. 
Lu “ u|White encrinital marble rock. 
—= =~ Space concealed with fragments of chert whe: iprialtGn, os 
cH and hornstone on the slope. whole, is perfectly analo- 
gous to the strata north 
“ . s . 
908} | cH on gg} jof the Wisconsin river, 
