What is blast hole?
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How are the layers of schist separated into alternating light and dark minerals?
What is hematite?
What is erosion?
What is inorganic matter?
What is the earths core made of?
What is the general statement regarding the temperature of water in oceanic depths?
How are fossils formed?
Explain why did the continents spread apart?
What is crude?
Describe the formation of igneous rocks?
What layer of the earth does magma form?
Where would you expect to find the oldest basalt on the floor of the atlantic ocean?