Mathematics – Logic
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993sciam.268...90y&link_type=abstract
Scientific American (ISSN 0036-8733), vol. 268, no. 1, p. 90-96.
Mathematics
Logic
Earth Core, Earth Surface, Planetary Evolution, Radioactive Age Determination, Earth Mantle, Geological Surveys, Plates (Tectonics)
Scientific paper
The use of radioactive dating techniques in search for clues about the earliest stages of terrestrial history is discussed. Particular attention is given to the uranium-lead method, zircon dating, development of the Super High-Resolution Ion Micro-Probe, measurements of rock's internal magnetism, the potassium-argon dating technique, and laser argon-argon dating. Results of recent research using these dating methods are summarized, with attention given to the dating of Agasta gneiss and tectonic drift studies.
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