MACKIE — EAMBLE IN THE NOilTH OF EKANCE. 
123 
this wonderfully diversified and miniature area should not have been 
more worked. 
Then came Abbeville and its gravels, and its fine old church, and 
its statue in the market-place; then the glorious cathedral of Amiens- 
Then a week's gaiety in Paris, and more than another week spent at 
llouen and along the Seine, until a temporary stay at Frascati's gave 
me the opportunity of commencing but not finishing a study of the 
clifls of Havre. The main clift', or falaise, consists of the Lower or 
Grey Chalk, which there contains numerous beds of large chert no- 
dules, in similar manner to the bands of flints in our Upper Chalk- 
The subdivisions of these beds I could not completely make out from 
top to bottom, but the notes I made are sufficiently accurate as far 
as they go, and for this reason are worth giving side by side with the 
subdivisions of the French geologist, M. Le Soeur, in 1848, it being 
borne in mind that the thicknesses of the strata, as given by me, are 
estimated by eyesight only, and not by actual measurement. 
I. Subdivisions of the Cretaceous and 
Wealden Formations recorded hy M. 
Le S(£ur at the Cliff under the Ligh t- 
house at Cap La Hece^ 1843. 
Terrain Diluvieu : — 
Argile rouge ; sable fin ; silex p} ro- 
matique. 
Craie Inferieure : — 
Craie chloritee grise ; lits et rognons 
de silex. 
Bandes de silex. 
Craie glaucoueuse blanche. 
Bandes de silex. 
Lits et rognons de silex. 
Bandes de silex. 
Ci*aie glauconeuse blanche et rognons 
de silex. 
Bandes de silex noir. 
Craie glauconeuse brune ; rognons de 
silex ; poly piers. 
{Sources.) 
Lits tendres endurcis de glauconie 
verte. 
Lits de marne bleue nou-e pvriteuse, 
avec lits de silex calcedoneux. 
Gros gravier ferrugineux. 
Section at Cap La Heve (Maclcie.) 
ft. in. 
Double chert 0 8 
1. Chalk 0 10 
Ditto 14 
2. Chert 0 6 
Chalk 0 8 
3. Chert 0 6 
Chalk 10 
Parting. 
Chalk 0 10 
4. Chert nodules, large and white 1 0 
Chalk 
5. Chert nodules 0 8 
Chalk — weathers in. 
6. Chalk 10 
Blue Parting. 
7. Band of chert 0 10 
8. Greenish sandstone ... 0 9 
9. Greyish green-grained chert, 
wanting at places ... 0 6 
10. Greenish-yellow soft sand- 
stone 0 6 
11. Band of cherty dark stone . 0 9 
12. Seam of dark-grey stone ..08 
Micaceous friable sandstone 
(soapy) 0 8 
