Which agent of transport below is least likely to round clasts off and separate them by size as they transports and deposits materials?
A) Running water
B) Wind
C) Beach waves
D) Glacier
D) Glacier
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Hudson stands at rest on a pair of bathroom scales. The scale readings will always
A. add up to more than his weight. B. add to equal his weight. C. each be half his weight. D. each equal his weight.
Waterborne disease has been completely eliminated from the United States
Indicate whether the statement is true or false
How does geomagnetism provide support for seafloor spreading?
A) Magnetic particles in basalt orient with the magnetic field in force at the time the oceanic lava cooled and hardened; the magnetic pattern is the same on both sides of the ridge. B) Mantle hot spots are always oriented to the magnetic field. C) The ocean floor is uniformly old, preserving the Earth's 4.6 billion history including past reversals in polarity. D) The oldest oceanic crust is always found near mid-ocean ridges. As one moves out from these ridges, the crust is simultaneously younger and oriented according to the polarity at the time. E) Isotopic analysis of ocean core sediments help determine sea floor age and this can be used to infer past magnetism.
The principle of lateral continuity proposes that sedimentary rock layers continue in all directions until they grade into a different rock type or thin out on the edge of a basin is important because ________
A) it provided a way to recognize if rocks had been deformed B) it provided an explanation how rocks behave in a depositional setting C) it allowed geologists to correlate sedimentary rock units over large distances D) it showed that catastrophism could not explain the flat layers of the earth