1852.] LYELL BELGIAN TERTIARY FORMATIONS. 2/9 



Table I. 



Synoptical Table of Tertiary Formations of Belgium and French Flanders^. 





Names adopted in this 

 Memoir. 



Nomenclature 



used by M. Du- 



mont in his Map 



of Belgium. 



British equiva- 

 lents. 



French equiva- 

 lents. 



Periods. 



a 



Loess and Alluvium 



Limon Hesbayen 



Brick-earth, drift, 

 &c. 



Alluvions and 

 Loess. 



Post-pliocene and 

 Pleistocene. 



B.l. .. 





Systeme Scalde- 

 sien. 



Red and coralline 

 Crags of Suf- 

 folk. 



Crag de Carentan, 

 Normandie. 



Pliocene. 





B.2. .. 





S. Diestien. 





C 



Bolderberg Sands 



S. Bolderien 



Wanting 



Faluns de la Loire 



Miocene. 



D.l. .. 



Upper Limburg Beds, or 

 Rupelmonde Clay. 



S. Rupelien. 



Upper freshwater, 

 and upper ma- 

 rine of the Isle 

 of Wight. 



Calcaire de la 



Beauce. 

 Sables et Gr^s de 



Fontainebleau. 

 Marnes a Ostrea 



cyathula. 

 Marnes sup^rieurs 



au gyps. 



Upper Eocene 

 (Lower Miocene 

 of many au- 

 thors). 



D.2. .. 



Middle Limburg, or Flu- 

 vio-marine. 



S. Tongrien su- 

 p^rieur. 



D.3. .. 



Lower Tiimburg 



S. Tongrien in- 

 ferieur. 



E.l. .. 



Laeken Beds, or Upper 

 Nummulitic {Nummu- 

 lites vuriolarius). 



S.Laekenien 



Barton Clay 



Sables moyens ou 

 Gr^s de Beau- 

 champ. 



Middle (or Num- 

 mulitic) Eocene. 



E.2. ., 



Brussels Beds, or Middle 

 Nummulitic {Nummu- 

 lites IcEvigatus). 



S. Bruxellien 



Bagshot and 

 Bracklesham 

 Beds. 



Calcaire grossier. 



E.3. .. 



Lower Nummulitic Beds 

 (Nummulites planula- 

 tus). 



S.Paniselien?,and 

 S . Ypresien, etage 

 superieur. 





Sables Soisson- 

 nais, partie su- 

 p^rieure. 



F.l. .. 



London Clay 



S. Ypresien, etage 

 inferieur. 



London Clay pro- 

 per. 



Wanting 



Lower Eocene. 





F.2. .. 



Plastic Clay and Sands . . 



S. Landeniensu- 

 pdrieiu-. 



Lower London 

 Tertiaries. 



Lignite Soisson- 

 nais. 



G 



Glauconite and Tufeau of 

 Lincent. 



S. Landenien in- 

 ferieur. 



Wanting. 





Intermediate be- 

 tween Eocene 

 and Cretaceous. 



H 



Marls and Glauconite of 

 Heers. 



S.Heersien 



Wanting. 



I 



Maestricht Chalk 



Calcaire de Maes- 

 tricht. 



Wanting. 





Cretaceous. 



* In Appendix, Nos. I. and II., at the end of this paper, will be found two Tables by M. Du- 

 mont, the first published in 1851, and the second previously unpublished, in which that distin- 

 guished geologist explains his views respecting the classification of the Belgian tertiary strata, 

 and their synchronism with those of England and France. 



