692 GEOLOGY OF OHIO. 
30, Dover township, about fifty-five feet above the Ames limestone, ig 
the outcrop of a conglomerate twelve feet thick, a mixture of small 
lime iron ore and small stone nodules, containing evidently so large a 
percentage of iron as to make it a valuable ore if it contains no dele- 
terious substances. In this immediate neighborhood forty feet of the 
shales above the Ames limestone are highly ferruginous, and bands of 
good ore are to be seen at so many elevations that their outcrops cannot 
be reduced to a system. The ore is most of it well oxydized, apparently 
rich and like the Fulton ore, and there are places where it is probable 
that this whole thickness of forty feet will be worked for the ore. The 
upper, soft ores, which are remarkably rich and well oxydized, will prob- 
ably present very different characteristics when the excavations are 
carried into the hills and beyond the reach of atmospheric influences. 
They are nearly all blue carbonates changed at the outcrops to sesqui- 
oxides. Some are calcareous, and from the soluble character of the 
limestone this is often dissolved out, so that the ore is concentrated as 
well as peroxydized, and such will pass into ordinary calcareous ores 
when impervious cover is reached. , 
The following analyses of these ores have been made by competent 
chemists: 
1 ») | 835 4 5 6 7 8 
SiliGaweee eee eenee 18.23 11.23 15.11 Cot 17.26 Gol 18.90 | 12.62 
Sill ph ungee eee eerer 0.17 0.48 0.20 0.06 0.15 0.12 0.19 | 0.16 
Protoxide of iron .-|----.-.. PADHEVE: hoa Soe 33.10 23.70 PLOW Nloooe onus 18.23 
Sesquioxide of iron-} 24.55 16.21 55.69 16.89 11.66 7.61 31.58 3.06 
Anminaeeeceeeree 1.15 2.66 Sala 0.27 7.64 2.14 1.97 0.19 
Oxide of manganese.| 2.27 7.18 | 11.35 2.90 3.03 4.95 1.83 | 7.14 
1 AROS nemsbeoea od 28.52 8.25 9.53 8.14 Coll? 14.45 24.70 |} 20.15 
Magnesia ......---- 1.78 1.78 2.01 2.03 2.75 3.32 1.04 3.03 
Phosphorus ..-..---- 0.05 0.07 0.03 0.05 0.36 0.04 0.04 0.05 
VA LOIN ee oe eae 1.90 1.70 0.10 0.95 2.07 0.82 3.13 3.10 
Carbonic acid ...... 22.05 24.25 3.05 28.85 23,70 Sikoo 19.80 } 30.85 
Motalseecaeces 100.80 99.70 | 100.23 | 100.99 99.54 98.70 | 100.18 | 99.08 
Metallic iron...--.. 17.19 31.49 38.98 BH das 26.60 25.90 22.10 | 16.32 
No. 1, Dover township, seventy-three feet below Ames limestone. By 8S. B. Newberry. 
No. 2, ore No. 4, Section 7, Trimble, (raw) ..----.-.---..---..--- 6 
INOS) ie BY ot (roasted ssa s casa eee & 
No. 4, ‘‘ No. 5, Jones’ land, Trimble township............----- OG ; 
IOs By SO ai Woh IO eS BSA AGS cabo GGUCdO b405 bodHC0 Sod CODE UG 
No. 6, °° Hopersbankssirim bl omeceserenmeiiaccenisse teeter OG 
INO Ae NO: 8, Jones’ land, a AINE cl BA eat aay eteaa tei e tats oG 
No. 8. ‘‘ No. 4, shale ore, COS it Ld SEs tN LSM haa ecard are Cee o6 
