f $OLE, 401 Constituent Parts. Magnefia 6,2 Silica 47>° \ Alumina 21,0 Lime 5.4 Iron 5.4 Water 17,0 ■ - ioz Bergman Opufcai Chem. t. 4. p. 151. , Geognostic Situation. It occurs in rocks belonging to the ncweft floetz trap formation. Geographic Situation. It is found in beds of waccc at Strigau in Silefia, and in balalt at Scheibenbcrg in Saxony ; in Italy it is found at Sienna and Tofcana, and in the Ifland of Lemnos in the Hellefpontic Archipelago. IT ft.
