STATE GEOLOGIST. 201 
Geology of the Field,—The principal underground formations are 
shown by the following records, furnished by the Fisher Oil Company: 
Well No. 1, George Keller farm: 
Feet. 
MODOC OWMECUNSSANGs rae cee kee, Acide we sia ice ee 547 
ELEY SEH Loran st2U baa Mev eaeatest ea ORS Lee AL Ua UBL Oo a Ma UTS 740 
Boutompot: COWMRUNESATIGI cies cie este chesiel cic ue ieeiane 940 
PRO PHO Tye ESSN Che crete cic claniteren ce vsue ee Clon gicien ne ghakaay 1,080 
BO CEO MIA O Leis LOMA Cite AN NEE Se RNA hae ote Bete aera nny 1,214 
ROD POEM nD Leama eer cities ctorsharateraleval venecaieny towetane: eoevced: aie teeny 1,214 
BOGEOMIE OA DRE Kis ei rece is te aes eee rea, Ae ha oat a2 1,220 
MO PLOLPMCCNeEHSAN Miya nde te reise cclcy carers al hpesenty Dao ange 1,220 
RO bali de pGliisymeccrsicreitra cues sens gia apace ont e oe ak otc oleae 1,258 
The sand marked “Cow Run” can at the most belong in part only to 
that formation. The lower part occupies the place of the Salt sand, and 
doubtless constitutes a part of that formation. The term “Cow Run”’ is 
often applied by the driller to almost any sand lying above the “Big lime.” 
It is very difficult, if not impossible, to identify this sand in Monroe 
county, since the principal formations by which it is recognized are the 
Cambridge and Ames limestones, neither of which is reported by the 
driller. 
Well No. 1, M. Wool farm. 
Feet. 
MO PROLAKiGenereSam Geiy eirs clb waite Sete saat ark Sudl Sg Weak 1,406 
IB OCLOMPOR NNCCN CLE SANCES c8 no aionc ba cvsralsuadenees che @iseet aves 1,446 
“4noyo), Cone JEph Inge ooh ou od Tara geaks kes a at ants Last CA 1,470 
BOR KOseal CONE IBV Mal pUhayyrewee's Bislois Gols eas Oty hese GG OO eG 1,575 
MODROTMBETEATSTI LR we ace ree ee cto eelae emo aee eieuaet is 1,972 
BOltoMPOPeBereareniti se hie tiaeere ik Mle wiieee anailene: whee 1,978 
ADGA OREN OVE Vis Bin trons Ree GES tipsters Cee CMEC a Boke earn CY cern nae 2,031 
The oil and gas are derived from the Keener sand, though occasionally 
a show of both is found in the Big Injun. The producing sand has com- 
monly a thickness ranging from 25 to 40 feet, thinning northward and 
thickening to the south. Frequently the sand is pebbly; especially is this 
true near the top. The wells are usually shot with from 60 to Io0o quarts, 
but charges reaching 160 quarts have been used. ‘The results of such 
heavy shots, however, have not been helpful, at any rate they do not seem 
to have done better than lighter shots would have done. When the wells 
have been shot a second time, the later charge has usually been heavier 
than the earlier one. 
The Mountain limestone or “Big lime” which lies above the Keener 
sand is thinner than it is to the south and southwest. According to Mr. 
A. L. Johnson, of the Fisher Oil Company, it has ordinarily a thickness of 
80 feet, but the well records frequently show figures much smaller than 
this. Occasionally the limestone contains a bed of sand interstratified, 
and this usually contains salt-water. 
