Shield volcanoes commonly have
A. fire fountains.
B. dikes at depth.
C. lava flows.
D. fissure eruptions.
E. All of these choices are correct.
Answer: E
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Why do geologists know more about Cenozoic rocks than rocks from other ages?
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Indicate whether the statement is true or false
In terms of dating of specific rocks, structures, or landscapes, relative age refers to
A) the approximate age of geological features based on the period or epoch in which they occurred. For instance, noting a feature is from the Cretaceous. B) the age of one feature with respect to another within a sequence of events and deduced from the positions of rock strata above and below one another. C) an educated guess of the rocks age based on its crystalline structure. D) the age of geological features based on radiometric dating techniques. E) the inability to ascertain exact age through isotopic methods and the necessity to provide a date range for such features.
Why is oxygen usually an oxidizing agent?
A. It is a very electronegative element. B. It likes to be oxidized. C. It does not undergo reduction. D. It is very abundant and so it is easier to react than nitrogen. E. all of the above