9 research outputs found
The mineralogy of paleosols in the MarĂlia Formation and their importance in the environmental evolution of the Maastrichtian of the Bauru Basin in southeastern Brazil
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Assessment of near-surface dissolution at and near the Waste Isolation Pilot Plant (WIPP), southeastern New Mexico
No full textThe area at and near the WIPP site was examined for evidence of karst development on the geomorphic surface encompassing the site. Certain surficial depressions of initial concern were identified as blowouts in sand dune fields (shallow features unrelated to karstification). An ancient stream system active more than 500,000 yr ago contained more water than any system since. During that time (Gatuna, Middle Pleistocene), many karst features such as Clayton Basin and Nash Draw began to form in the region. Halite was probably dissolved from parts of the Rustler Formation at that time. Dissolution of halite and gypsum from intervals encountered in Borehole WIPP-33 west of the WIPP site occurred during later Pleistocene time (i.e., <450,000 yr ago). However, there is no evidence of active near-surface dissolution within a belt to the east of WIPP-33 in the vicinity of the WIPP shaft. 26 refs., 11 figs., 1 tab
The effect of aerobic exercise after a period of inactivity on bone remodeling and calcium and phosphorus balance in mature horses
No full textPellets, ooids, sepiolite and silica in three calcretes of the southwestern United States
No full textUse of RP4-prime plasmids constructed in vitro to promote a polarized transfer of the chromosome in Escherichia coli and Rhizobium meliloti
No full textGenetic and biochemical analysis of mutants induced by bacteriophage Mu DNA integration into Klebsiella pneumoniae nitrogen fixation genes
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