538 



J. P. BLAKE ON THE UPPER 



Fig. 11. — Map of the Loire 

 between Sancerre and La 

 Charite. (Scale 1 : 80,000.) 



_ Seels J 



there is no difficulty now in re- 

 cognizing it as the tailing off of the 

 great Coral-Pa g-like mass which 

 characterizes the valley of the 

 Yonne, more especially as it has 

 not been recognized on the left 

 bank of the Loire. The whole 

 space between these quarries and 

 those of Pouilly appears to be oc- 

 cupied by barren lithographic lime- 

 stones, the thickness of which it is 

 impossible to estimate. The quar- 

 ries of Pouilly are worked in a 

 finely oolitic stone, somewhat 

 false-bedded and containing few 

 fossils ; this must correspond to the 

 white limestone of Tonnerre and 

 Yincelles ; and we should expect to 

 find representatives of the Diceras- 

 beds above : of these no evidence 

 was found at Pouilly ; but Hau- 

 lm (3) and Douville and Jourdy 

 (60), speaking of the same beds 

 seen on the opposite side of the 

 river at Sancerre, describe a re- 

 gular Diceras-bed as attaining its 

 maximum there, though dying 

 away to the west. On the hill 

 north of Pouilly are seen, first, 

 lithographic limestones, then some 

 rubbly limestones with Terebra- 

 tula Leymerii, and at the summit 

 the marls with Exogyra virgula, 

 and no more is apparent in this 

 direction, though higher beds 

 might well be developed. These 

 present no special point of in- 

 terest, beyond showing the con- 

 stancy of this portion of the series 

 in contradistinction to the varia- 

 bility of the beds below. 



7. Department of the Cher. — 

 Works on this department have 

 • been published by Fabre in 1838, 

 and Boulanger and Bertera in 

 1850 (10) ; but the most recent 

 description is that by Douville 

 and Jourdy, above quoted (60). 

 These latter authors classify the 

 series as follows : — 



