128 MESSRS. A. J. JUKES-BROWNE AND W. HILL : [May 1 896, 



ammonites are sufficient to prove the bed which yielded them to be 

 of Lower Gault or Albien age. 



Prom Lisieux, acting under the advice kindly given us by M. Bigot, 

 the country south-east of the valley of the Touques, in the neigh- 

 bourhood of St. Paul de Courtonne and Orbec, was next explored. 



At La Haute Roche, about ^ mile S.S.E. of Courtonne du Murdrac, 

 the following section was seen : — 



Feet. Ins. 



Yellowish-grey chalk, slightly glauconitic, scattered grey 

 cherts and ramifying siliceous concretions in discon- 

 tinuous beds 4 



Chalk similar to the above, -with two beds of massive chert... 2 6 



Yellowish-grey chalk, glauconitic, with scattered cherty or 



siliceous concretions 1 9 



Yellowish-grey chalk, firm, slightly glauconitic, with large 



cherts arranged in discontinuous lines 10 



Mealy, yellowish-grey, very glauconitic chalk, seen for 1 6 



This exposure occurs in a low cliff capping the summit of a hill, 

 and is not far from the base of the Cenomanian, which was estimated 

 to be 12 or 15 feet lower than the bottom of this exposure. About 

 this vertical distance glauconitic sand was well shown in the hedge- 

 row and in the field below, the base of the Gaize being probably 

 indicated by a spring and the boggy nature of the ground ; if this 

 surmise is correct, the Gaize and Gault cannot be much less thau 

 30 feet thick at this point, and may be more. 



The section can be followed for some little distance, but the 

 junction-beds were not noticed. 



About 300 yards S.S.E. of the church of St. Paul de Courtonne, 

 13 feet of whitish-grey, slightly glauconitic chalk was seen, with 

 discontinuous lines of grey chert, and 30 yards farther on there 

 was a course of hard, grey, lumpy chalk with many fossils, about 

 2 feet thick, making with the other a continuous section. The 

 ground then dropped suddenly, forming a steep pitch, a feature 

 constantly noticed at this horizon in many localities in Calvados, 

 and below this it sloped gently to the banks of a brook some 

 50 yards away. 



The soil was full of large glauconitic grains, evidently Greensand. 

 A little farther S.E., in the next field, along the steep pitch of 

 the ground already noticed, were many hard calcareous masses 

 full of glauconite and of the same character as those of the junction- 

 beds at Honfleur and Hermival, but the glauconitic grains were 

 smaller. About | mile farther S.E., opposite the turning of the 

 road to Orbec, many specimens of Pecten asjper occurred in lumps of 

 hard chalk scattered along the top of the pitch, the material 

 adhering to them beiug yellowish-white, slightly glauconitic chalk, 

 not like the basement-bed which was seen in the banks of the brook 

 4 or 5 feet lower. 



The basal beds of the Cenomanian were again shown about 

 300 yards east of the Chapel of St. Julien de Mailloc, in a small pit 

 in a field. The section was as follows : — 



