124 



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



Hill, 1895. 



Feet. 



Bed 7. 



20 



15 



10 



/Firm whitish chalk with layers 



of chert nodules, about 



Bed 8. •{ Greyish-white chalk divided into 

 beds by layers of chert-nodules, 



^ bluish-grey in colour 



{Grey glauconitic chalk, with hard 

 calcareous masses and some 

 cherts — many brown phos- 

 phatic nodules 



( Greyish - white chalk, slightly 

 glauconitic, with layers of grey 



or black cherts 24-30 



Hard, grey, shelly, glauconitic 

 chalk, with hard crystalline 

 lumps and green - coated 



nodules 



Conspicuous layer of cherts ... 

 Yellowish -grey chalk divided 

 into beds by courses of chert- 

 nodules, bands of bluish-grey 



chalk at intervals 



Bluish-grey glauconitic chalk ... 



Yellowish -grey chalk with four 



layers of black cherts 



{Bluish -grey, glauconitic, sandy 

 marl, with black phosphate- 

 nodules at the base 

 Thin seam of brown sand, about 



Bed 6. 



Bed 5. 



Chloritic 



Marl. 



10 

 1* 



28 

 3* 



U 



Lennier, 1884. „ 



Feet. 



Compact grey chalk with nodules 

 of bluish chert in layers 11| 



Yellow or grey chalk, sandy, 

 with layers of chert and black 

 flint 26 



Grey chalk with layers of cherts 

 and many brown nodules ; this 

 bed is very fossiliferous 10 



Grey glauconitic chalk with 

 chert -nodules and layers of 

 black flint 32 



Hard, grey, sandy chalk in two 

 beds with a course of sandy 

 glauconitic marl between 10 



Thick band of mammillated flint. 1 



Yellowish chalk, with irregular 

 layers of chert and beds of grey 

 sandy chalk 26 



Bed of large black flints 9 in. 



Grey glauconitic chalk 9 in. 



Siliceous bed 9 in. 



Sandy glauconitic marl with sili- 

 ceous concretions, thickness 

 unknown. 



Bed 4. 



The 



Gaize. 



Bluish-grey sandy marl, seen for 6 or 8 feet. 



We were unable to see the marly seam which is taken by 

 M. Lennier as the summit of the Cenomanian at St. Jouin ; our 

 measurements were taken to the base of a nodular bed having the 

 unmistakable character of Melbourn Rock. There was apparently 

 no represent ative of the marl with Belemnitella plena at Brunval. 



It will be seen, on looking at the diagram facing this page, that 

 above the hard bed at St. Jouin, and above the massive cherts at 

 Cape La Heve, the Chalk has the same general facies, and the same 

 description will apply to both. 



Bed 7. 



About 35 to 40 feet above the massive and conspicuous layers of 

 chert at La Heve, and about the same distance above the marked 

 hard bed described in the section at St. Jouin, there is a band of 

 chalk containing many scattered phosphatic nodules of a brownish 

 colour. These are most numerous between the chert-beds, and the 

 chalk between them is often very glauconitic, rough and gritty to 

 the touch. The phosphates do not occur with much regularity, and 

 are more conspicuous at some points than at others. Beyond the 

 fact of their occurrence there is no lithological break ; they come 

 in with chalk containing more glauconite than usual and pass away 

 again in about 15 feet. Many fossils occur in this bed, but there 



