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The two most abundant elements in Earth's continental crust are _____. oxygen and silicon Which major non-silicate rock forming mineral is the primary constituent of the rock limestone? calcite Which of the following is the least abundant of the eight rock forming elements that make up most of the continental crust? iron; oxygen; aluminum; calcium; magnesium
As we discussed in a previous lecture, the relative abundance of elements in the Earth's crust determines what minerals will form and what minerals will be common. Because Oxygen and Silicon are the most abundant elements, the silicate minerals are the most common. Why are the silicate minerals the most common minerals in the earth's crust? 2  Give an alternative name for each of the following groups of silicates (a) nesosilicates, (b) double island silicates, (c) cyclo-silicates, (d) inosilicates, (e) sheet silicates.