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new gypsumhigh frequency screenin Brasilia Brazil South America. Small MineralHighFrequency ScreenIn Brasilia Brazil South America. Map of easternsouth americashowing the study area the rectangle marks the area shown in fig 2 the dashed circle indicates the 600km radius of the impact zone of the trindade plume head at 8580 ma as proposed by gibson et al 1995 1997 contour lines in the …
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