GEOLOGICAj:. OBSERVATIONS IN FRANCE. 31/ 



I'he country on the right bank of the Orne begins to differ Limestonf 



perceptibly from that on the left. At Ussy 10 or 11 miles 



N. N. VV. of Falaise, limestone occurs in strata. The course 



of the Orne indeed appears the boundary of two different 



jkinds of country : on the left bank we find micaceous argil- divided from 



laceous schist, and on the right limestone. The argillaceous thebctiitbf 



. the Orne, 



schi^t of the woody part of Normandy may be considered as 



forming the transition to the primitive rork, that constitutes 

 ihe most advanced part of the peninsula of Cherbourg to the 

 N. N. W. At Veriieuil nodules of flint reappear in the Flinty challc. ' 

 chalk, and we begin to perceive vineyards. The line traced * '^ y^ 

 by Mr. Arthur Young on this point appears to me very ac- 

 curate. 



Thus we see, 1st, that the part of France where we find a Extent of tli-i« 

 chalky soil interspersed with flints stretches S. E. and N. VV., ^^^^• 

 and is pretty accurately included between the mouths of the 

 Seine and fhe Lys, occupying a breadth of about 50 leagues 

 [125 miles] and a length of 70 [175 miles]: 2dly, that in 

 this the highest cliffs occur, at Ica.^t among those that are 

 seen between St. Valery on the Somnie and Cherbourg. The 

 following table will show this more conspicuously. 



Heights above the sea in Table of 



faces. toises&thousandih parts. heio-bts above 



According According the level of the 



to Deluc toTrt'nibley. ^^^* 



Beaumont-sur-Oise •• .^.. .•35'352- 39 514 



^Amiens*.. f....38'801 3S-977 



Frixecourt SO'OOp 30'321 



Ault 25-437 26'-100 



Treport 59*458 6'0'99O 



Etretat 52-944 54*243 



Cape de la H^ve 46'"545 47 729 



Honflour 41798 42*887 



Caumunt 14r32() 143-707 



Cahagnes 88*206' 89-13.5 



Auinay * 58-61 7 58-913 



Harcourt ...-*. 22'672 23'229 



yiif. 



