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Porcelanite - a rare material of polished stone artefacts
Šrein, Vladimír ; Šťastný, Martin ; Šreinová, B. ; Langrová, Anna ; Kolman, Blahoslav Jan
Contact metamorphism is effected by heat supply at the contacts of rocks with magmatites. This process produces porcelanite, vitrification of sandstones and burning of coal seans, among other things. In detail mineralogical study we determined calcic feldspar and pyroxenes as a major minerals with titanite, calcite, zeolite, analcime and others.
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The use of geophysical measurements in the Settlement Pattern of Prehistoric Bohemia Project
Křivánek, Roman
The six-year project Settlement Pattern of Prehistoric Bohemia (1997-2002) has been basen on a wide cooperation of non-destructive methods (aerial and geophysical prospection, systematic field walking, geoarchaeology etc.). This paper summarize wide range of efficient aplication of geophysical (mainly magnetometric) surveys of different types of newly identified archaeological sites (settlement areas, hill-forts, barrow fields, production areas, closed and open linear features and enclosures, archaeological situations with unclear site interpretation or sites of unknown origin).
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