58 FLUOESPAE DEPOSITS OF SOUTHEEN ILLINOIS, [bull. 255. 



important development of barite, which is particularly interesting in 

 view of the absence of that mineral in the ore body on the hill. The 

 relations of the two were not made out. 



South of Lead Hill, near Cave in Rock, and between that place and 

 Elizabethtown, there are a number of faults and some prospecting 

 has been done. So far as could be learned no considerable bodies of 

 ore have been found. 



Evreka mine. — North of Lead Hill the rocks are faulted and dis- 

 turbed at a number of points and prosj^ecting has been carried on, 

 without, however, so far as known, developing any ore bodies of con- 

 sequence. A possible exception is the old Eureka mine, not the same 

 as that near Rosiclare (sec. ^?>, T. 11 S., R. 9 E.), which is said to 

 have yielded several tons of galena. The worlvs are now abandoned, 

 but at the shaft a fault plane running N. ()0° E. may be seen separat- 

 ing .sandstones believed to be JNIansHeld to the north and Chester to 

 the south. The dump shows small pieces of galena, fluorspar, and 

 calcite. 



SCATTERED MINES IN POPE COUNTy. 



General relations. — Much the larger portion of Pope County nortli 

 of Bay Bottoms is underlain by sandstones of the Mansfield and 

 Chester formations. The general absence of the Ste. Genevieve and 

 lower limestones makes it difficult to recognize faulting, and so, while 

 disturbances of the strata have been noted at a number of points and 

 prospecting is widespread, relatively little lias been determined with 

 regard to the stratigraphy of the region. There is one belt of mines 

 extending from the vicinity of the Empire mine to the "Old Clay 

 diggings'"' of the Pittsburg Mining Company near Raum. A second, 

 or possibly a contimiation of the first bcH, includes a number of pros- 

 pects near Aliens Spring. Near (loh-oiuhi there are a fcAV veins and 

 some i)r()S])ecting has been done, and noi'tlieast of town are the Park- 

 enson and (iordon mines, already discussed. Near Bay City con- 

 siderable lead ore is said to have been mined. These minos and pros- 

 pects will be discussed in the above order. 



P/ffshiir<i mine. — The Pittsburg Mining Company has sunk two 

 shafts and driven one tunnel into a narrow belt of limestone out- 

 cropping in the general sandstone region near Raum. The lime- 

 stone is dark, flinty, and not very fossiliferous. It seems to be of 

 St. Louis age. It outcrops in a belt about '200 feet wide, having a 

 general course N. 3.5° E., and is said to be traceable for several miles. 

 The sandstone to the northwest, at least, is probably Mansfield. 

 That to the southeast is of undetermined age. The limestone is 

 much broken and there are considerable bodies of breccia. Galena 

 {iud blende occur in small veinlets tlirou2:h the limestone and in the 



