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Oriented specimens of very young lavas have been collected from 3 volcanic sites in Kenya in order to determine the declination and inclination angles at the times the lavas cooled. TheseD andI values have been tentatively fitted to a time scale extending over the past 1000 years based on historical, geological and vegetational evidence. A plot of declination against inclination for this period takes the form of a partial loop, somewhat similar to those obtained at other places. 相似文献
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Population regulation and speciation in the oceans 总被引:3,自引:0,他引:3
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