

EY E. B. TAWNEY, E.G.S. 



Read at the General Meeting^ April \st, 1875. 



rpHE object of these notes is to bring before the Society Professor 

 -^ Renevier's Table of Sedimentary Rocks, which, though 

 printed in Erench, will be found, I think, of great use even to 

 English students. In the first place, it forms a'most convenient 

 guide to refer to if one is seeking the place among English strata, 

 or the equivalence of any foreign beds ; and besides, it gives in a 

 very compact form the leading fossils of the various divisions of 

 sedimentary rocks. This it effects most conveniently from being 

 printed in diagram form with parallel columns ; e.g,^ if we refer to 

 the Carboniferous rocks we find, besides the column of leading 

 fossils, &c , nine columns which give information on the presence or 

 absence of the different sub-divisions of the Carboniferous epoch 

 and peculiarities of local facies, with the local names used in those 

 nine districts. In the case cited, the nine are — (i) England, 

 (ii.) Erance and Belgium, (iii.) Germany, (iv.) Russia, (v.) North 

 America, (vi.) Jura Mountains, (vii.) Italian Alps, (viii.) "Western 

 Alps, (ix.) Eastern Alps. 



In glancing through this scheme of the well-known Professor of 

 Geology in the Lausanne Academy, we cannot do better perhaps 

 than follow the order of his own remarks in the explanation which 

 he has printed in his native language. To begin with then, we 

 must note that the diagram is printed in horizontal bands of 



