Minggu, 03 Januari 2010

Igneous Rock Clasification

Mineral Percent Abundance Chart

     The table at the top of the page is read vertically, from zero% at the bottom to 100% at the top (scale on left and right sides). For example, the composition of the rock on the farthest right side of the chart is (bottom up) about 92% olivine, and the remaining composition to the top about 8% pyroxene.

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