The actual age of the volcanic rock on Midway is about 27.7 million years. Suggest a reason why your answer for problem 3 differs noticeably from this.
Perhaps the rate of plate motion has changed over the last few million years;
perhaps the location of the hot spot has drifted slightly.
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The two keys to determining the absolute age of a rock are
A) measuring the abundance of parent isotope and measuring the abundance of daughter isotope. B) knowing the half-life and measuring the abundance of parent and daughter isotopes. C) knowing the composition and the geologic period the rock is from. D) identifying all the minerals in the rock and knowing the half-life of each mineral.
What is metamorphic grade, and present an example of how a rock reaches its metamorphic grade? What will be an ideal response?
Where are the deepest parts of the oceans?
A) in rift valleys at sea floor spreading center B) along the base of the continental slope C) in the abyssal plain D) in trenches
An EF-1 tornado is capable of considerable roof damage.
Answer the following statement(s) true (T) or false (F)