Le.-ley.] 



30 



[Jan. 2 and Feb. 6, 



many miles length, and on continuous outcrops of ore ground of every 

 conceivable variety of character, quality and quantity. 



It is provable by reference to sections Figures 1, 2, 3, and other illus- 

 trative drawings in this report, that there exists several of these belts ; 

 representing different geological horisons ; and due to an extra charge of 

 iron given, we know not how, to sediments of different ages. As, on a 

 grand scale iron-bearing rocks occur at various stages of the column of 

 palaeozoic rocks from No. I, Potsdam S. S., to No. XII, Coal Measures, 

 — so, within the narrower limits of one subdivision of this column, viz., 

 in the Lower Silurian system, iron bearing rocks occur at various stages, 

 separated by from 500 to 2000 feet. These have already been stated. 



Fig. 7. 



Jumna cut in iiJash,ore Pi^ifA Ores^reaArs Onejhoff^iet. 



The measurements will be given in my Detailed Description of the Ore 

 Banks, and no repetition of them is here necessary.* I will only give in 

 tabular form the thickness of the Lower Silurian Limestone formation 

 so far as visible and as measured along Warrior's Mark Run : — 



Hudson River Slates feet. 



Trenton Limestone, &c 2500 



Pennsylvania Furnace and Gale Hollow Ore Banks : 

 Interval of Limestones 700 



Huntingdon Furnace Ore Banks : 

 Interval of Limestones 550 



Pipe-ore Range near Toll-gate : 

 Interval of Limestones. 1500 



Pennington, Town, Lovetown Banks : 

 Interval of Limestones 3000 



The edge of the Fault stops further measurement downwards : . 



Total visible thickness of Limestones 7750 



* See No. 31, Huntingdon l^urnace Banks. 



