196 Scientific Intelligence. — Geology. 



100 



Lime was, therefore, nearly as abundant in the fossil as silica 

 in the containing sandstone rock. 



13. On Tertiary deposites. — Marcel de Serres, in his inter- 

 esting work on the Tertiary Deposites of the South of France, 

 maintains, that, in that quarter, the coarse marine limestone 

 (Calcaire grassier) and plastic clay abound. This, however, 

 is denied by Cordier, Rozet, and Boue, who are of opinion, 

 that these rocks are entirely awanting there, for there we have 

 the Mediterranean basin, in which all the tertiary rocks are 

 newer than the coarse marine limestone, and commence with the 

 blue clay. The great basins of Wallachia, Bessarabia, Galiicia, 

 Hungary, Austria, Bavaria, and Switzerland, belong to this sys- 

 tem. Indeed, Dr Boue remarks, in a letter to Professor Jameson, 

 " that the plastic clay, and coarse marine limestone of Paris, exist 

 only at Paris, and, perhaps, also in England, and at a few points 

 in Northern Germany, at Cassel, Helmstadt, Evessen, &c. 

 Elsewhere no such formations exist, for all the lignite, or brown- 

 coal deposites, in other countries, occur in the upper tertiary 

 formations ; and all which Brongniart and others have classified 

 as coarse marine limestone in various parts of Europe belong 

 decidedly to the same upper tertiary formation, which is Boue's 

 second tertiary limestone, or the calcaire moellon of Marcel des 

 Serres. The coral-limestone of the tertiary basins of Austria, 

 Hungary, and Galiicia, according to new observations, lies, not 

 below, but above the blue sub-Appennine clay. This deposite 

 occurs in the same situation in the Manche, Tourraine, and 

 Lower Brittany ; and the coral limestone of Vienna, according 

 to C. Prevost, takes the same position in the tertiary series."" 



14. Chalk in the United States. — Dr Morton of Philadelphia 

 has transmitted to Paris a Memoir on the Chalk and Green- 

 sand he has discovered in the United States. It will appear '\\\ 

 the Annales des Sciences Naturelles of Brongniart. 



