sedimentation can add clay minerals to the iron oxide. episodic sedimentation can cause the deposit to have alternating bands of iron oxide and shale . silica in the formof jasper, chert , or chalcedony can be added by chemical, clastic, or biological processes in small amounts or in significant episodes...
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control and prevention (cdc), about sharps injuries occur annually to hospital employees. potential hazard exposure to blood and other potentially infectious materials (opim) because of: unsafe needle devices. improper handling and disposal of needles and other sharps. possible solutions use safer needle...
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