Revietcs — Palceocene Strata in Denmark. 377 



regarded as a portion of the Huronian and represent the lowest 

 members of that system in Eastern Ontario and in Quebec adjoining, 

 and that the upper part of the Huronian is represented by the more 

 schistose portion seen in the area farther south and west. In this 

 manner much of the difficulty hitherto experienced in interpreting 

 satisfactorily the great problem of the crystalline rocks disappears." 



The Palaeozoic rocks extend, according to the map, from the 

 Potsdam Sandstone to the Trenton, both inclusive, but in the text 

 they are said to range from the Calciferous to the Trenton Lime- 

 stone. They form the remnant of the western margin of the great 

 Ottawa basin, and are found at intervals along the Ottawa river, 

 and also as scattered outliers in some of the neighbouring town- 

 ships. They occur also on the north shore of the river near 

 Ottawa city, as well as in places on the south shore. 



Large collections of fossils were made, chiefly from the Black 

 River Formation, lists of which are given. 



The chief features in the surface geology of the district are large 

 areas of clays, sands, and gravels, some of which show their marine 

 origin by their containing the remains of fishes, etc. 



The economic minerals do not appear to be of much importance, 

 with the exception, perhaps, of iron and mica. 



In the Appendix to the report (pp. 49-71) Dr. H. M. Ami gives 

 preliminary lists of fossils from the Chazy, Black Eiver, Trenton, and 

 Pleistocene Formations. The best collections from within the area 

 are those from the Black River Formation. The lists include the 

 names of species long familiar to workers in the field of North 

 American palaeontology. They will prove an invaluable index to 

 the interpretation of the age of the rocks in which they may be 

 found Avherever stratigraphical data might, without confirmatory 

 evidence, be unconvincing. A map coloured geologically and on 

 a scale of 4 miles to 1 inch accompanies the report. 



A. H. F. 



II. — Pal^ocene Strata in Denmark, near Copenhagen. By Karl A. 



Gronwall and Paul Hardkk. 

 Paleoc^n ved Rfgaard I Jydland og dexs Fauna ; af Karl A. 



Gronwall og Poul Harder. Danmarks geologiske Unders0gelse, 



II Ptaekke, Nr. 18. 1907. 



EXPOSURES of Palseocene strata are scarce in Denmark, but 

 by a careful study of the fossils from the neighbourhood of 

 Copenhagen considerable additions have been made to our knowledge 

 of the Palaeocene fauna. These strata belong, the authors think, to 

 a zone older than that of the Thanet Sand, and tending to fill up the 

 gap between Cretaceous and Tertiary. A considerable number of new 

 species are figured and described ; the rest are mainly referred to forms 

 already known in North Germany. The deposit yielding these fossils 

 is a glauconitic sand, with a conglomeratic base containing derivative 

 Cretaceous fossils. The Cretaceous rock below is Senonian, the higher 

 Cretaceous zones beina: there absent. 



