Abstract
ANY territory which is sufficiently large may be divided for any geological age into areas of tectonic uplifts and subsidence of the earth's crust, the rate of uplift and subsidence being different for different places1. One may speak about an average and a 'volume,' rate of subsidence and uplift, meaning the rate of increment of the total volume of all the tectonic depressions and convexities of the earth's crust within a given territory. This total volume rate of movements may be calculated. The volume of subsidences is approximately equal to the total volume of sediments accumulated during the given time. An elevation of the earth's crust causes erosion, and the volume of the uplift may be determined from the volume of the eroded clastic material3,4. In this way the problem is confined to a determination of the volumes, on one hand, of all the deposits accumulated; and on the other, to a separate determination of those of clastic deposits. Tracing from one geological age to another the change of these values, it is possible to study in volumes (cu.km.) the kinematics of the vertical movements of different signs. Referring these volumes to a unit of area (sq. km.) gives the average magnitude of subsidence or uplift of the earth's crust (in km.).
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References
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RONOV, A. A VOLUMETRIC METHOD FOR A STUDY OF THE HISTORY OF EPEIROGENIC MOVEMENTS. Nature 159, 479–480 (1947). https://doi.org/10.1038/159479a0
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DOI: https://doi.org/10.1038/159479a0