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On the Mechanics of Mountains

Published online by Cambridge University Press:  01 May 2009

Harold Jeffreys
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Summary

It appears that the geophysical approach to the problems of crustal dynamics leads to a theory of mountain formation that covers the main features of the formation of nappes and is in general agreement with other geological evidence. The chief novelty is in the recognition of the importance of the spreading under their own weight of the rocks uplifted as a result of crustal shortening.

Type
Original Articles
Information
Geological Magazine , Volume 68 , Issue 10 , October 1931 , pp. 435 - 442
Copyright
Copyright © Cambridge University Press 1931

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References

page 435 note 1 Proc. Nat. Acad. Sci., xv, 1929, 713–24.Google Scholar

page 435 note 2 Gerlands Beiträge zur Geophysik, xxvi, 1930, 58–60.Google Scholar

page 437 note 1 Bull. Seism. Soc. Amer., xvii, 1928, 203–6.Google Scholar

page 438 note 1 Monthly Notices of the Royal Astronomical Society, Geophys. Suppl., ii, 1930, 323–9.Google Scholar

page 438 note 2 Dr. Tilley says (Mineral. Mag., xxi, 1926, 50): “The absence of almandine in the normal contact-aureole, (and) the visible evidence of its replacement when introduced into the sphere of influence of igneous intrusions, conspire to demonstrate that the iron garnet is unstable under the conditions prevailing in normal contact metamorphism.” The temperature of formation of this mineral must naturally be considerably lower than that of its decomposition.Google Scholar

page 440 note 1 109 dynes is about a ton weight.Google Scholar