Sedimentary rocks account for about what percentage of the Earth's outermost 10 kilometers of rock (first percentage). Also, what percentage of the Earth's continental area is covered by sedimentary rocks (second percentage)?
A)3.5% and 100%
B)85% and 100%
C)65% and 10%
D)5% and 75%

Question

Quizplus · Accepted Answer

Sedimentary rocks account for about 5% of the Earth's outermost 10 kilometers of rock, but they cover about 75% of the Earth's continental area. This discrepancy is because sedimentary rocks are often found in layers at the Earth's surface, especially on continents where they can be more easily studied and observed.

Sedimentary Rocks Account for About What Percentage of the Earth's