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LAPLAIGNE PERUWELZ - Service géologique de Wallonie

LAPLAIGNE PERUWELZ - Service géologique de Wallonie

LAPLAIGNE PERUWELZ - Service géologique de Wallonie

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4.2. Les matériaux utiles............................................... 27A- Les calcaires..................................................... 27B- La houille.......................................................... 28C- Les marnes........................................................ 28D- Les sables et les grès ........................................ 28E- Les argiles......................................................... 28F- Les limons......................................................... 29G- Les tourbes ....................................................... 29Bibliographie ...................................................................... 30Annexe ................................................................................ 37Farben- und Zeichernerklärung - Legen<strong>de</strong> – Legend.......... 3844

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