Abstract
LONDON Geological Society, June 17.—Olaf Holtedahl: Some general structural features of the arctic and adjacent regions. The huge region comprising the Canadian and the Baltic Shields and the areas lying between them represents a sort of structural unit which may be more or less symmetrically divided by two lines, one north and south, the other at right angles to it, crossing each other in the central part of Greenland. Although Baffin Land and the western zone of Fennoscandia had a somewhat different history in ancient geological times, yet each may be regarded as the reflected image of the other, both consisting of mountain ranges with the highest elevation on the side bordering the adjacent deep sea area. In the northward continuation of these two zones, in Elles-mereland and Spitsbergen respectively, and at the north end of Greenland, are other zones where the distribution of the various formations tells of a some-what similar inclination of the earth's crust an inclination away from central Greenland, the previously mentioned structural centre. Thus there is, in a roughly ring-shaped belt, an inclined elevation of recent, probably younger Tertiary, date, and it seems a natural conclusion that this particular elevation has been of fundamental importance in the gathering of snow, which in Quaternary time developed into the modern ice-fields, the centre of which coincides with the above-mentioned structural centre.—James Archibald Douglas and William Joscelyn Arkell: The stratigraphical distribution of the cornbrash: (2) The north-eastern area. Attention has been chiefly confined to the brachiopod zones, and their distribution throughout the area is indicated by a detailed account of many typical exposures. Further readjustment of Buckmans zonal table has been found necessary in respect of the zones of Tegulithyris bentleyi and Obovothyris stiltonensis. The evidence for and against penecontemporaneous erosion is discussed.
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Societies and Academies. Nature 128, 125–128 (1931). https://doi.org/10.1038/128125b0
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DOI: https://doi.org/10.1038/128125b0