IRON ORES OF THE CLINTON FORxMATION 39 



S;:CTION AT LAKEPORT (coutilllicd) 



Strata 



Shale . 



Shale . 

 Shale . 



Shale . 



From 

 Feet Inches 



129 



135 

 152 



171 



Shale ' 276 



Ore 



Shale 



Ore 



Limestone 



Ore 



Shale 



Shale 



Shale 



Ore 



Shale 



Ore 



Sandstone , 



294 

 295 

 295 

 296 



296 

 297 



328 



335 

 342 

 342 

 342 

 343 



To 

 Feet Inches 



Character 



6 

 I 



1 1 



o 



o 

 o 



3 

 10 

 1 1 



3 



135 



152 

 171 



276 



294 



295 

 295 

 296 

 296 



297 

 328 



335 

 342 

 342 

 342 

 343 

 345 



I 



3 

 II 



o 

 o 



o 



3 

 10 

 1 1 



3 

 10 



This is a shaly limestone with 

 bands of shale. The limestone is 

 fossiliferous and contains several 

 bands of very lean ore, with many 

 crinoid stems. 



Shale with abundant fossils. 



Olive-gray shale with fossils — 

 a few thin bands of limestone. 



Light and dark shale, with few 

 bands of limestone. At 171 feet 

 there is a 4 inch band with black 

 pebbles. 



Shale with limestone bands, 

 3 to 4 inches thick. Some of the 

 bands show faint traces of ore. 



Lean fossil ore. 



Gray shale. 



Fossil ore. 



Whitish limestone with i^ inch 

 of shale at base. 



Fossil ore. 



Light and dark shale with thin 

 bands of limestone. Trace of ore 

 at 328 feet. 



Shales with bands of limestone. 

 Both contain fossils. 



Soft, very dark shale with a 

 few bands of a lighter color. 



Oolitic ore, with fragments of 

 bryozoans. 



This is a dark shale dividing 

 the ore. 



Coarse grained ore, associated 

 with calcareous sandstone. 



The upper 4 inches is a band of 

 shale with 2 inches at middle of a 

 conglomeratic nature. The basal 

 6 inches is a white sandstone. 

 The remaining portion contains 

 thin layers of mottled, dark, 

 sandy shale. Some of the sand- 

 stone has a reddish tinge showing 

 faint traces of ore. 



This hole was intended to test the long- stretch between 

 I'revverton and Verona throughout which the Clinton fornia- 

 t'on is mostly conceale;!. The results indicate some similarity i>t 

 conditions in regard to ore deposition with the section at IVewer- 

 lon and also with that at Clinton, but the oolitic hed is much 



