Mid Term 3.docx - 1 Since the acceleration of fracking...

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1. Since the acceleration of fracking, earthquake frequency in Oklahoma a. Has decreased significantly b. is much lower than that in California b. Is no longer an issue d. is nearly equal to that in California 2. Earthquakes may be promoted by fracking because a. Hidden buried faults may be lubricated by fracking fluids b. Explosive materials are injected into deep bedrock c. Fracking causes changes in climate d. Fracking causes subsidence of the land surfaces 3. Fracking is used primarily to extract oil and gas from a. Limestone bedrock b. Fractured granite c. Shale bedrock d. Metamorphic rocks contorted by faulting 4. In an undisturbed sequence of sedimentary rocks, younger layers overlie older layers, according to the principle of ________. a. superposition c. original horizontality b. original continuity d. uniformitarianism 5. Uniformitarianism is succinctly summarized by which phrase? a. The future is the key to the present. c. The past is the key to the present. b. The present is the key to the past. d. The present is the key to the future. 6. A tilted sequence of sedimentary rocks violates which principle? a. superposition c. original horizontality b. original continuity d. uniformitarianism
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7. If an igneous dike cuts across a sequence of sedimentary beds, ________.
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