Discuss the suite of sedimentary rocks that forms on a passive margin with increasing distance
and water depth from the shoreline. What happens to this suite of rocks during a regression?
What happens during a transgression? What will be an ideal response?
The student should describe the sandstone-carbonate-shale assemblage. Sandstones form close
to shore, partly as the result of wave activity. Shales are deposited a bit further offshore and
result from deposition of suspended clay particles that float a greater distance from the shoreline.
During a regression, these facies move outward on the continent resulting in a distinctive vertical
sequence with carbonates overlain by shales, which are overlain by sandstones. During a
transgression, these facies move onto the continent resulting in a distinctive vertical sequence
with sandstones overlain by shales, which are overlain by carbonates.
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Where does the majority of oil pollution in the ocean come from?
A. blowouts (oil escapes under high pressure from a borehole on the ocean floor ) B. tanker accidents C. fisheries D. runoff from land E. cruise ships
For small molecules, which of the following usually is the weakest intermolecular interaction?
A) covalent bonding B) dipole-dipole interactions C) London dispersion forces D) hydrogen bonding
A certain carboxylic acid has a Ka of 2.7 x 10^-5. What is the pH of a 0.10 M solution of this acid?
A) 4.57 B) 5.57 C) 2.78 D) 2.28
Which of the following accurately describes a benefit or a drawback of managing an even-aged tree plantation?
A) Even-aged stands create a more complex groundcover habitat. B) Even-aged stands are less vulnerable to disease and insect outbreaks. C) Even-aged stands are more vulnerable to bark beetles. D) Even-aged stands are unpopular because they are difficult to harvest and replant. E) Even-aged stands possess more structural complexity than natural forests.