514 



J. F. BLAKE ON THE UPPER 



mosensis ; and the next abundant 

 records also Trigonia gibbosa, but 

 well represent the true Portland 

 ized by Astarte rugosa ; but this 



Pig. 4. — Map of Country be- 

 tween the Meuse and Ornain. 

 (Scale 1 : 80,000.) 



shell is Astarte rugosa. Buvignier 

 with doubt. These beds may very 

 Limestone, which is also character- 

 question will be decided later on. 



One more traverse completes 

 our study of the Meuse department. 

 This is about 25 miles to the 

 south, but runs N.W. to S.E., 

 the general trend of the strata 

 changing near the extremity of 

 the department to be N.E. and 

 S.W. instead of N. and S. The 

 whole series spreads about 8| 

 miles on either side of Gondre- 

 court, actually commencing within 

 the Vosges department. 



The lowest beds are exposed 

 at Greux, on the Meuse ; and we 

 still see the nodular calcareous 

 grits at the top of the Oxford Clay, 

 here more approaching what could 

 be called a " terrain- a-chailles " 

 than anywhere else, and still cha- 

 racterized by Rhynchonella Thur- 

 manni. No sign, however, of the 

 Ferruginous Oolite was observed ; 

 and Buvignier does not place it 

 here on his map. It has therefore 

 probably died out; for it is not 

 seen again to the west. Neither is 

 any thing like the Creue Limestone 

 or " Coralline Oolite " seen ; but 

 the great mass of Coral Rag im- 

 mediately succeeds. This consists 

 of a rubbly rock, in places oolitic, 

 without any corals, yet of that pe- 

 culiar appearance which indicates 

 the beds associated with them ; 

 and all the usual fossils abound, 

 such as Cidaris florigemma, Hemi- 

 cidaris crenularis, Mytilus angula- 

 tus (jurensis), &c. It is succeeded 

 by a white chalky limestone with 

 numerous hollow branches as of 

 decayed corals, such as are seen 

 at Novion. Some beds are flaggy ; 

 but all very barren of fossils. 

 Above comes 12 feet of strong beds 

 of oolitic and non-oolitic limestones, 

 which are worked for building- 



