300 GEOLOGY OF ILLINOIS. 



tough, that occurs in concretions. This makes a very durable building stone, 

 but is hard to work. 



In section 8, township 11, range 3, there is a somewhat extensive quarry 

 in the sandstone below coal No. 1, and very near the bottom of the Coal Meas- 

 ures. A similar rock was formerly worked in sections 7 and 8, township 11, 

 range 2, along Cedar creek. Besides those already mentioned, there are some 

 smaller quarries in township 9, range 3, township 10, range 1, and township 

 12, ranges l.and 2. 



Limestone for Lime. Nearly all the outcrops of the Burlington will afford 

 abundant supplies of material for this purpose, and being nearly pure carbon- 

 ate of lime, yields an excellent article. Some of the Coal Measure limestone 

 has been burned, but the supply from this source is very limited. Lime is, at 

 present, most extensively manufactured in section 1, township 11, range 3. 

 Better facilities for getting fuel for the kilns, and the manufactured lime to 

 market, is all that is necessary to render this business an important source of 

 wealth to some portions of the county. 



