Geology and Petrography of Revaites
| Autoři | |
|---|---|
| Rok publikování | 2013 |
| Druh | Konferenční abstrakty |
| Fakulta / Pracoviště MU | |
| Citace | |
| Popis | The contribution deals with theme of revaite, a raw material for chipped industry in prehistoric times. The authors try to characterized the rock and determine its source. It has been known that the revaite pebbles are secondarily deposited in fluvial gravels. The raw material was found in a gravel pit at Ostrožská Nová Ves (Mátl 2000), on alluvial terraces near Ostrožská Nová Ves, thence in the sand pit of Hulín and also in the south-west of Kroměříž. A rare finding we have from glacifluvial gravels in Opole-Groszowice in Poland. The authors also present the qualities of revaites – shape, color, concentric zoning of partially transported fragments and size of pebbles. The revaites were used for chipped tools in prehistoric times. These artifacts are likely in the wider area of Uherské Hradiště, in the Napajedla Hills and around Kroměřiž. Revaite artifacts have been described at the Paleolithic stations Kvasice and Karolin in the Kroměříž area in the Přerov area (Vokáč et. al. 2001), and at an Aurignacian station Boršice near Buchlovice (Škrdla et. al. 2003). We have investigated also thin sections of revaites that yielded relics of microfossils (algea diatoms). On the basis of the microfossil findings, the Dynów marlstone and menilite cherts with layers of silicified shale are supposed to be the source rocks for revaites. Using the laser ablation (LA–ICP–MS, carried out by S. Hušková) we have determined chemical composition of revaites and supposed source rocks to deal with the question of revaite origin. |
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