Abstract
THE first part of Herr Salomon's great monograph on the Adamello group was noticed in our columns on July 22, 1910. In this second one he describes the diluvium (for he retains this term consecrated by ancient error), such as the different types of moraines, the erratics from the central mass (which have been carried far), and the erosive effects of the ice. In regard to the last, considerations of space forbid us to say more than that he has a firm faith in the excavating powers of glaciers, and regards them as agents of no small importance in the sculpture of the Alps. The remaining and larger portion is devoted to a study of the intrusive rock of the massif and its enclosures. The former, as might be expected, exhibits several varieties, which are often closely associated, and indicate a differentiation in the original magma, before it arrived at its present position, with an approach to solidification in the more basic portions. Thus sometimes the latter have been carried away as actual fragments (not very happily named Lacerations-sphäroide) in the more liquid material, while sometimes a kind of mottling or streaking is produced, as mav be seen in the Guernsey diorite. Not seldom also the rock is cut by aplitic and pegmatitic veins, representing the most acid residue, as the fragments do the earliest and most basic segregate. Of these we find some excellent photographs, with others of a more general character.
Die Adamellogruppe, ein alpines Zentralmassiv, und seine Bedeutung für die Gebirgsbildung und unsere Kenntnis von dem Mechanismus der Intrusionen.
By W. Salomon. II. Teil, Quartär, Intrusivgesteine. Pp. vi + 435–603 + Taf. ix–xi. (Wien: R. Lechner (W. Müller), 1910.) Price 12 kronen.
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Die Adamellogruppe, ein alpines Zentralmassiv, und seine Bedeutung für die Gebirgsbildung und unsere Kenntnis von dem Mechanismus der Intrusionen . Nature 86, 310 (1911). https://doi.org/10.1038/086310b0
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DOI: https://doi.org/10.1038/086310b0