176 GEOLOGY OF OHIO. 
and is hence often referred to as the “buff” limestone, to distinguish it 
from the blue limestones below. These ore beds are detached outliers of 
a great ferruginous sheet which once covered much of Stark and Car- 
roll and all of Tuscarawas county. Patches of this ore sheet, separated 
from their connections by the erosion of the valleys of the Sandy, Conot- 
ton, and Tuscarawas, occur in the isolated hills of Osnaburg and Paris, 
the only portions of the county geologically high enough to include 
them. Such being the geological position of this important formation, 
it can not be expected to be found in any other portion of the county, 
even though the hills may there rise to an equal relative or absolute 
‘height with those referred to. It is important to bear these facts in 
mind, in order that tume and money be not wasted in useless search for 
the blackband and mountain ore. | 
I subjoin analyses of the raw and calcined blackband from Robertsville: 
RAW. @CALCINED. 
BOA AEH 12) Ain ae mga Rd RESIN PT IRE: PRE POEL AN SOR Pn iS en SUN cls Heat Ce 18.60 Sa 
SVU CE estas Seelam tte a clan Ata ar Ml GAO See ior he 8 ciclo d 31.40 12.83 
Voy avn a p:<) 1-6 sya Mega eg lpe eb) RD aL AeA pater arr Uren AU hte De NS LL ahh alt 18.75 69.94 
Tron CArbOM Abe esi oo telesales eye yer ay ho hae aye ereteetan 23.14 sere 
Mam ganeselarreeins percha aia init apeea copia ch ay IN steta, Ake Seth ee eee cuape 1.80 3.15 
PNIDDH OTD) OE Rae eee aR AAP Cat RIS SES nt a eet ene ee ae) 1.00 7.00 
dime; phosphatewssres - 26 eu ae cr teers See ae eee oe teen eee eters eter 0.72 2.35 
IDA HKOPHA OIE es) Hess aan SoacocHe Hobe ecmoCehd EHS cNdcbU dSoG4ec 0.75 eee 
IDADCi Sea ee See ee meee i Be me aS ee hy a Me ete Aas thea 
IMqOMES ase eH rors te it cee eae ERNE Ya Aaa Pe tanya (at ceareee real 2.86 2.16 
SVU, OR AE eA RA SMa hoe BOO AO Abe nC Goh OO GOO SO poe 4,28 0.14 
99.30 99.37 
Me Calli G inom sceb sire HAS es, Siok ee te Rim cy Gatto Meng a enn payee 24.28 48.95 
PHOSPHOTIC ACIS eBoy eM CN eed als UOC AEN ap Nr rise ee eRe 0.31 1.03 
