Report copyright - kb.psu.ac.thkb.psu.ac.th/psukb/bitstream/2553/3971/5/167448.pdfParasnis (1997) 2500-2810 kg/m 2640 kg/m 1610-2760 kg/m 2350 kg/m Quartz 2500-2700 kg/m 2650 kg/m Orthoclase feldspar
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