Abstract
Low level glacial deposits often include large trans ported masses which are known in Germany as a variety of “Schollen.” They there consist of sedimentary blocks ranging in age from the Jurassic to Glacial. The majority belong to strata from the Chalk to the Miocene. These glacial Schollen have been catalogued and described in an admirable monograph by Dr. Georg Petersen of Trier. He deals with 459 examples, including a few from Russia and Denmark: 205 of them have been discovered by bores; the remainder are exposed in cliffs and quarries or on the surface. The largest is a sheet of chalk at Sternitten in Samland, which is 4 km. long by 2 km. wide and 14 to 20 m. thick. The great majority of those measured are less than 10 m. long. The Sternitten Scholl has been carried 4 km. from the bed of the Baltic. As a rule they have been transported a short distance, but one near Leipzig has apparently been brought from Rugen. The author attributes the transport to glacial action, and directs attention to the view of Prof. Keilhack, who has pointed out their resemblance to the results of drifting ice-floes in the Baltic during severe winters. A special feature of the monograph is the author's view that the Schollen afford evidence of widespread Pleistocene earth-movements in North Germany.
Die Schollen der norddeutschen Moränen in ihrer Bedeutung für die diluvialen Krustenbewegungen.
Dr.
Georg
Petersen
Von. (Fortschritte der Geologie und Paläontologie, Heft 9.) Pp. iv+179-274+1 Tafel. (Berlin: Gebrüder Borntraeger, 1924.) 6s. 9d.
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Die Schollen der norddeutschen Moränen in ihrer Bedeutung für die diluvialen Krustenbewegungen . Nature 116, 240 (1925). https://doi.org/10.1038/116240b0
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DOI: https://doi.org/10.1038/116240b0