On the Geology of the environs of St. Leger sur 

 Dheune* (Department of the Saone and 

 Loire.) By M. Lefallois. 



(Annales des Mines, 1822.) 



THE village of St, Leger, situated on the little river 

 Dheune, is oa every side surrounded by hills, which are in 

 general well cultivated and without cliflFs or ravines ; so that 

 the gypsum quarries are almost the only places in which we 

 can study the geological structure of the country. 



The hill rising above the village on the East, is that 

 which contains the gypsums. It is elongated from South to 

 North, and is cut off on the South, at less than two myria- 

 metres [about 15 miles] from St. Leger, by a small valley, 

 on the other side of which the coal measures appear, which 

 afterwards predominate in the commune of St. Berain ; it is 

 terminated on the west by the Dheune, and apparently ex- 

 tends some distance to the North. 



The gypsum formation principally occurs half way up. It 

 is very well exposed in three of the quarries worked in open 

 day. The following beds may be observed : 



^ This notice forms part of an account of the gypsum quarries of the 

 same place. (Trans.) 



