An apparent negative excursion at bed 22 is correlated with the globaltemperature decline. The ~(87)Sr/~(86)Sr ratio of 0.707605 can be related to the tectonic processand sea level rising resulting from the rapid Indian Ocean ridge expansion in Campanian.Decrease of detrital weathering materials is resulted from ingression.

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At the stage of platform, the "higher Pb-Zn source bed" would be formed in the plantform-type carbonatite forma tions, especially in the first carbonatite position after every large-scale ingression, by enrichment of weathering deposition, diagenesis, biogenesis and organogenesis.

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The variations of temperature have not only controlled the freeze-thaw action, but also exert great influence to salt and insolation weathering.

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Chemical weathering is an important ligament connection land with ocean, basin with lake, inversion of climate with environment.

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Except weathering of original ore bodies,soil formation of karst laterite is accompanied and mixed.

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On the basis of making it clear that laterization includes such three integrated stages as weathering, micro-granularity and soil formation of laterite, the thesis illuminates characteristics of Kunming laterite in chemical composition, physical mechanics, composition of granules, fractal dimension of granularity and the connection of granules. The experiment using soil reinforced agent to solidify the laterite shows that the mechanical traits of laterite have been improved because of its involvement, the best compact indicators and shear strength ones increased and the indicators of laterites penetrability and compression decreased. The effects of reinforcement can be weighed through its coefficient and the mechanism of reinforcement can find the explanation in the effect of soil reinforced agent on the laterite granules, the changes in the electric double layer caused by soil reinforced agent and its enwrapping of laterite granules.

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Finally, we conclude that the factors controlling the geomorphic characteristic of low relief in our study area is rock types, sedimentation, weathering and high-altitude peneplanation.

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The movement of precipitation in a disturbed soil/rock entity with known fracture density, characterized by a weathering layer of gneiss beneath a shallow soil layer, was measured by a large lysimeter during rainfall events.

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Under such conditions, Mandan women had to grow maize capable of weathering adversity.

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With a quantitative research on the chemical and clay compositions of marly stones, their weathering rocks and residuals, as well as SEM observations, the process of dissolution of CaCO 3 and concentration of clay minerals with complex...

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