Reviews — Dr. Brogger — Glacial Changes in Christiania. 317 



Wengen-Cassian epoch, and that the northern area was especially 

 subject to local variability during the Upper Cassian and Raibl 

 periods (ant. Q.J.G.S. 1893, Geol. Mag. 1894 and 1900, Verhaud- 

 lungen 1900). In 1900 I prepared a transverse section through 

 Sella Pass on the north of the fracture-zone, according to which 

 the stratigraphical succession is as follows : — (1) Wengen tuffs 

 and shales with the typical plants and bivalves ; (2) Cassian lime- 

 stones, marls, tufaceous" shales and grits, containing the typical 

 Stuores-Cassian fauna together with Fachycardia rugosa and several 

 other species found at Seiser Alpe, but not, so far as yet known, 

 at the Stuores locality near St. Cassian ; (3) Upper Cassian lime- 

 stones and tufaceous marls and breccias ; the ' Cipit-Kalk ' or reef- 

 limestone lenticles are imbedded in tufaceous rocks containing 

 a transitional Cassian-Raibl fauna, and passing conformably under 

 the Schlern-dolomite rocks of the adjacent mountain-massives. At 

 Sella Pass numerous specimens of Fachycardia rugosa occur at both 

 the Cassian zones; on the other hand, certain forms such as Trigonodus 

 Bablensis and certain species of Avicula make their first appearance 

 in the Upper Cassian zones. The rich fauna found in the ' Pachy- 

 cardia tuffs ' of the Seiser Alpe (v. Zittel, Zeitschrift, 1899) is very 

 well represented at Sella Pass. And comparing my Sella Pass 

 section with my former sections in Enneberg and Arapezzo, the 

 ' Pachycardia tuffs ' are demonstrated to be the time-equivalent of the 

 whole St. Cassian series. 



It has previously been supposed that the Wengen-Cassian series 

 were absent in Fassa, but I have found that although, thinly 

 developed, the Wengen and Stuores-Cassian zones are present at 

 the base of the Vallaccia limestone massive between Fassa Valley 

 and Monzoni, and at the base of the Punta di Costabella. 



E-E ^VIE ^W S. 



Om de Senglaciale og Postglaciale Nivaforandringer I 

 Kristianiafeltet (Molluskfaunan). Af W. C. Brogger, med 

 Bidrag af E. B. Mtjnster, P. Oyen, o. pi. Med 19 plancher og 

 69 figurer i Texten. Norges geologiske undersogelse, No. 31. 

 (Kristiania : H. Aschehoug & Co., 1900 og 1901.) 



On the Late Glacial and Post-Glacial Changes of Level in 

 THE Christiania Region, By W. C. Brogger, with contribu- 

 tions by E. B. MiJNSTER, P. Oyen, and others. Norwegian 

 Geological Survey, No. 31. 8vo ; pp. 731, 19 plates, and 69 

 figures in the text. 



THE changes which Norway has passed through, in the concluding 

 portions of the Glacial period and subsequently to the present 

 time, have not been so systematically and thoroughly investigated 

 as those in the eastern portion of the Scandinavian peninsula, and 

 though various branches of the subject have been described during 

 the last fifty years the Norwegian geologists have not, as a rule, 

 specially concentrated their researches on this part of the geological 



