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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
The Major Components of the Crust of the Earth. Most of the common rock-forming minerals are combinations of the most abundant materials in the Earth, taking into account the differentiation of the Earth into lighter and denser layers early in its history. Here is an approximate listing of the eight most abundant elements in the crust in terms of their overall mass and relative atomic abundance: