322 ON THE DEPOSITS CALLED TERTIARY 



example, as a real alternation between a maritime 

 sestuary and a fresh water lake. 



Thus may I end this general view of the nature 

 and distinctions of those two classes of deposits to 

 which I consider that the term tertiary strata should 

 be limited, to the exclusion at least of the others. 

 Yet they evidently demand two terms and two distinc- 

 tions. I cannot but believe that it will prove their 

 true theory ; and that, as far as the facts go, the ex- 

 clusions which I have made will, together with these 

 distinctions, bring light on this hitherto dark subject, 

 and ultimately lead to such records of facts as will 

 confirm them, while they complete this portion of the 

 history of the Earth. I may proceed to notice some 

 of the recorded cases, as being probably expected in a 

 chapter on this subject. 



Though careful investigations into this portion of 

 geology, date only from the report of Cuvier and Bron- 

 gniart, the first hint of such deposits seems to have 

 originated with Lamanon in 1782, while those of 

 Switzerland attracted the attention of Count Razou- 

 mowski in 1789. Of those which have been noticed, 

 the following examples will serve to show that they 

 form an extensive class of strata, to which future exami- 

 nation must be expected to add many more. 



In Europe, there have been observed, those of 

 England, comprising the Isle of Wight and the 

 London district ; those of France, including the basin 

 of Paris, that of the Loire and Allier, that of the 

 Garonne and Adour, with those of the Bouches du 

 Rhone, and of Auvergne ; to which may be added those 

 of the Rhine. Similar deposits also occur in the 

 North of Germany, from Holland to Poland ; and in 

 Bavaria, Switzerland, Austria, Hungary, Transylvania, 



