Abstract
Abstract Tertiary sediments were collected from the Miura group on the Miura Peninsula, and the total chlorine and fluorine in these sediments were determined colorimetrically, together with the water-soluble chlorine and fluorine. There was little correlation of the contents of insoluble chlorine and fluorine in the sediments to their locations and ages. The insoluble chlorine contents of the psammitic rocks were higher than those of the pelitic rocks, whereas the insoluble fluorine contents of the former were lower than those of the latter. There seemed to be a moderately negative correlation between the contents of insoluble chlorine and fluorine in the sediments. All the sediments analyzed contained very small amounts of water-soluble fluorine (0.001 to 0.002% F). The frequency distributions of the insoluble chlorine contents in both the psammitic and pelitic rocks were lognormal.
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