40 GEOLOGICAL MEMOIRS. 



Half a mile distant from this pit is the Winterling sand-pit^ con- 

 taining Cerithium, Voluta, Venus, and numerous teeth of Otodus and 

 Lamna, which, as genera, have reference to the Calcaire grossier. 

 The clays, then, of Fronstetten and Neuhausen would correspond to 

 the gypsum, and the limestone of Winterling, Bachzimmern, and 

 Blumberg, to the Calcaire grossier of the Paris basin. [T. R. J.] 



On the Tertiary Clays at Osnabrijck. By E. Beyrich. 



[Geolog. Zeitschrift, 1851, vol. iii. p. 211-213 ; and Leonhard u. Bronn's N. Jahrb. 

 f. Min. u. s. w. 1852, 3 H. p. 358.] 



Among the shells collected by Fred. Roemer in these clays, there 

 are only a few eocene species, and indeed only such as elsewhere 

 reach to the pliocene series, as Typhis horridus and Dentalium entale. 

 On the other hand, of characteristic miocene and pliocene species are 

 found — 



Conus antediluvianus, Brocc. Cytherea multilamella, Lam, 



Pyrula reticulata, Lam. Isocardia cor, Lam. 



Fusus politus, Ren. Limopsis aurita, Br. 



Natica Guillemini, Per/r. minuta, Phil. 



Turritella subangulata, Brocc. 



These clays best correspond, not to the septarian clays of Branden- 

 burg, but to the longer known tertiary marls which are equivalent to 

 those of the Doberg near Biinde and the beds of Freden, Dieckholz, 

 and Kassel. There are also among the shells from Bersenbriick three 

 species, which Goldfuss described from Griffel near Winterswyck in 

 Geldern, viz. Astarte concentrica, Cardita chamceformis, and Iso- 

 cardia cor. 



Compared with Dumont's classification for Belgium published in 

 1849, the whole of the Tertiary formations of North Germany would 

 be equivalent only to the three groups by him termed miocene, 

 — Systemes Tongrien, Rupelien et Boldei'ien, the second of which 

 comprises the clays of Boom and Baesele, which are identical with 

 the septarian clay of Brandenburg. To this system in North Ger- 

 many may perhaps belong, as a younger member, the beds from which 

 the Sternberg stone is obtained. To the Systeme Tongrien the green 

 sandy and argillaceous sandy beds would belong, which, about Mag- 

 deburg, cover partly the Brown-coal and partly the older rocks ; to 

 the Systeme Bolderien, the typical miocene strata of Osnabruck, 

 Biinde, Hildesheim, and Cassel, probably also of Holstein, Liineburg, 

 and Sylt Island. M. Beyrich does not determine whether the two 

 older Belgian systems should be more correctly termed Upper Eocene, 

 or Lower Miocene. From the stratigraphical conditions in North 

 Germany the author assents to Dumont's view, drawn from similar 

 Belgian conditions, in opposition to D'Archiac, that the clays of the 

 Systeme Rupelien are not the equivalent of the London clay, but over- 

 lie the Systeme Tongrien, which covers, near Brussels, the equivalent 

 of the Calcaire grossier of Paris. Still less do the septarian clays of 

 Brandenburg belong to the Calcaire grossier. [T. R. J.] 



