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Moldavite are result of melting and mixing of ejecta Cenozoic deposits from Ries crater. The Czech moldavites have different Al, Ca and Si content in contrast to tektites from Lusatian area. Differences in chemical composition of moldavites are caused by local interbedded layers of Tertiary Obere Süâwasser Molasse, which are represented by: quartz sands and limestons with clays.
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