440 Prosser — Stratigrajphic Position of Hillsboro Sandstone. 



Section on knoll and in gully on the Charles Rogers farm. 



Total 

 Thickness Thickness 

 No. Ft. In. Ft. In. 



4. Hillsboro sandstone. — Large blocks of 



very light gray to white, fine-grained, 



quartz sandstone. From top to base 



of sandstone blocks 7 8 20 11 



3. Covered interval of 2 feet 1 inch on knoll ; 



but limestone ledge exposed in gully 



just to the east with interval of 2 feet 



5 inches between the lowest sandstone 



block in the upper part of the gully 



and the lower sandstone layer 2 5 13 3 



2. Sandstone layer which is apparently in 



place 13 10 10 



1. Magnesian limestone which effervesces 



slowly in cold HC1. The rock is hard 



except where weathered and in litho- 



logic appearance it resembles the Mon- 

 roe more than the Cedarville. The 



ledge is rather blocky and rough, more 



like the thick-bedded Monroe, and does 



not contain the pores and cavities 



which are so generally found in the 



Cedarville dolomite. No fossils were 



found 9 V 9 7 



The sandstone is apparently dipping to the west as shown 

 by the elevation of the highest outcrops. The top of the sand- 

 stone layer in the gully as leveled is 1 foot lower than the top 

 of the sandstone block on the knoll to the east, or 5 feet by the 

 barometer ; while the top of the highest layer of sandstone in 

 the road gutter is 5 feet lower according to the barometer than 

 the top of the upper sandstone layer in the gully to the east. 



In the field to the west of the road on land owned by Mrs. 

 Ellen Burns are outcrops of rocks and three small quarries in 

 the limestone have been worked to some extent. The follow- 

 ing section was made in this field : 



Section on the Mrs. Ellen Burns farm. 



Total 

 Thickness Thickness 

 No. Ft. In. Ft. In. 



7. Ohio shale. — Base of black shale outcrop 



on the road. 

 6. Covered interval. As leveled by Mr. 



Walter A. Verwiebe from the top of 



the limestone in the third quarry to the 



