142 M. CiiARBAUT on the 



The most elevated hill met with on the left of the road 

 from Lons le Saunier to Pannessieres, is the only one, -where 

 I have as yet been able to recognize in place the beds of sili- 

 ceous sandstone with impressions. 



The coal bed of the gryphite limestone formation appears 

 on the summit of the Savagnu hill, on the south of the 

 village. 



The knoll of Montmorot is based on a small isolated 

 portion of the longitudinal hill separating the two neigh- 

 bouring salt springs, cut on the south by the principal valley, 

 and on the north by a small transverse gorge. 



This isolated knoll, around the foot of which the gryphite 

 limestone formation is recognised, is crowned by beds of the 

 oolite formation ; this point offers an undeniable proof of the 

 proposition I have advanced. 



On the north of the knoll, a fine breaking away (arra- 

 chenient) of variegated marls is discovered, the beds of 

 which run nearly N.N.W. and S.S.E. (11 heures), and in- 

 clined towards the east at 50° ; it is in these marls, at 200 

 metres [656 feet] to the N. of the gorge, that two pits 

 have been driven to the gypsum; the dark red colour of that 

 which I collected among the debris, leads me to think that it 

 belongs to the inferior masses of the formation. 



The two gypsum quarries of Courbouzon and St. Laurent 

 are situated on the prolongation of the direction of these 

 beds ; every thing leads me to believe that they are hollowed 

 out of the same longitudinal hill (coteau), which disappears 

 at Mont Orient, beneath the oolite limestone formation. 



The gryphite limestone rocks of the valley of Macornais 

 are but the prolongation of the hills in the basin of Lons le 

 Saunier, which are covered in the interval by patches of the 

 oolite limestone formation. 



The coal bed which I have already noticed at two points 

 in the Lons le Saunier basin, occurs again in the valley of 

 Baume a Voiteur, where an excellent gypsum quarry is 

 worked ; it belongs to the same formation. 



This small bed of coal did not appear to me worth work- 



