278 Clara Gould Mark 



mounds explored in the Kanawha, Scioto and Miami valleys, as 

 well as on the sites of modern villages." 



In appearance the flint is quite attractive, fresh specimens being 

 as a rule more or less translucent and exhibiting a range of colors 

 varying from pure white through different shades of yellowish 

 brown, red, purple, and blue, to black. When weathered it seems 

 to become less translucent and often has a tendency to break up 

 into small rectangular pieces. The flint contains numerous cav- 

 ities which are usually lined, and sometimes completely filled, with 

 druses of quartz crystals. Many of these crystals are large enough 

 so that their crystalline form may be readily seen without the aid 

 of a magnifier, while others are so small that they merely impart a 

 frost-like appearance to the surfaces they cover. When carefully 

 examined they appear to be almost colorless in themselves but 

 they often borrow the color of the underlying flint and show beau- 

 tiful shades of blue, amethyst, red, brown and yellow. 



The more impure portions of the flint very frequently contain 

 large numbers of small foraminifera of the species Fusulina seca- 

 lica. In some places the rock is completel}' filled with these fos- 

 sils, and as many as one hundred and fifty have been counted in a 

 single square inch. The flint containing the Fusulinas is usually 

 white or light buff in color, and does not show the more brilliant 

 colors of the purer flint. The c^uartz crystals, however, are abun- 

 dant, often being intermingled with the fossils. The flint of this 

 character is said by Mr. Fowke to be found upon the borders of 

 the flint area, while that which is purer, more compact and brighter 

 colored occupies the central portion. On page 622 of the Archea- 

 ological History of Ohio he gives an account of the clearing out of 

 one of the pits at Flint Ridge, in which was found forty inches of 

 flint resting directly upon solid blue limestone. 



It seems quite probable that the flint and underlying limestone 

 represent the horizon of the Putnam Hill limestone, though more 

 extensive field work will be necessary before such a correlation 

 can be made with any degree of certainty. 



Flint Ridge Cannel Coal Mine. Just north of the west end of 

 Flint Ridge is a bed of cannel coal which has been mined in a small 

 way for the last seventy years or more. At present coal is being 



