Right Points Earned: 1/1Correct Answer:CYour Response:C2.Which correctly gives the order of the faults, from oldest (first) to youngest (last):3.Which is younger:4.Which is younger:
5.Which is not accurate about the Grand Canyon, in Arizona:A.The rock record of the canyon contains many unconformities.B.The youngest rock layer at the canyon slants downward to the north beneath still-younger rocks of Zion, Bryce, etc.C.The canyon is wider at the top and narrower at the bottom because the river was wider when the region was wetter, and has narrowed as deserts spread recently.D.A great thickness of sedimentary rocks exists in Death-Valley-type faulted basins, which can be seen deep in the canyon in many places.E.In the deepest part of the canyon, the river cuts through rocks formed by metamorphism of older sedimentary rocks in the heart of a mountain range.The idea of the river narrowing over time was the hypothesis that an interested tourist presented to one of the professors and a ranger at the Canyon a few years ago. When the professor asked whether the tourist would want to go out on a narrow point with a jackhammer, the tourist said no, because the rocks might fall off and slide down into the Canyon. When the professor pointed out the many places that rocks had fallen off and slid down, the quick-witted tourist figured out that the Canyon has been widened by such rockfalls as the river has cut downward. All of the rest are accurate.Right Points Earned: 1/1Correct Answer:CYour Response:C6.Early geologists did not have radiometric dating techniques, or long layer-counted histories. Instead, they followed William Smith in putting things in order, and then used uniformitarian calculations based on modern rates of processes and observed results of processes in the geologic record. These early geologists, using these techniques, found that the Earth:
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