Continental volume and freeboard through geological time

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Authors:Schubert, G.; Reymer, Arthur P. S.
Author Affiliations:Primary:
Univ. Calif., Dep. Earth and Space Sci., Los Angeles, CA, United States
Volume Title:Nature (London)
Source:Nature (London), 316(6026), p.336-339. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836
Publication Date:1985
Note:In English. 19 refs.; illus. incl. 1 table
Summary:The consequences of approximately constant freeboard for continental growth are based on a model relating volumes of isostatically compensated continents and oceans to the secular decline in terrestrial heat flow. A post-Archaean increase in freeboard by 200 m requires continental growth of 10%, while a decrease in freeboard by 200 m over this time requires a crustal growth of 40%. Shrinkage of the continental crust since the end of the Archaean is ruled out. Changes of >10% in post-Archaean crustal thickness are unlikely. [R.K.H.]
Subjects:Continental crust; Continents; Crust; Density; Heat flow; Isostasy; Mathematical models; Phanerozoic; Precambrian; Properties; Proterozoic; Regression; Sea-level changes; Secular variations; Tectonophysics; Theoretical studies; Thickness; Transgression; Upper Precambrian; Volume; Evolution
Abstract Numbers:86M/2660
Record ID:1985082685
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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