In which general type of rocks do nearly all fossils occur?
Volcanism and metamorphism
Which of these rock-cycle processes is primarily driven by the water cycle?
According to the principle of isostasy, which of these Arizona cities is underlain by the thickest continental crust?
Silicates are the most abundant minerals in the Earth's crust.
Many silicate minerals are particularly resistant to weathering.
Which of these sedimentary structures could only have formed when sediments were exposed to the air ?
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