Abstract
HYPOTHESES involving substantial changes in Earth radius over geological time can be tested by measuring palaeogravity at, or near, the Earth's surface. The measurements are obtained by comparing the pressure–temperature conditions in the upper mantle, disclosed by kimberlite nodules of known age, with the computed pressure–temperature conditions for that time1. Recently published data for six groups of kimberlites, the earliest from the late Precambrian, are analysed here.
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STEWART, A. Limits to palaeogravity since the late Precambrian. Nature 271, 153–155 (1978). https://doi.org/10.1038/271153a0
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DOI: https://doi.org/10.1038/271153a0
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