Archean and Proterozoic greenstone belts are similar except Archean greenstone belts have

significantly more ultramafic lava. Indicate whether the statement is true or false.


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Environmental & Atmospheric Sciences

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Which of the following sites is most likely to be flooded if all other factors are held constant?

A. a site that is higher but closer to the river than a site that is lower but farther from the river B. a site on the floodplain instead of a site on an older terrace C. a site next to the river where the main channel is wider and deeper than other segments of the river D. All of these choices are correct.

Environmental & Atmospheric Sciences

A thermal inversion aggravates the effects of which of the following?

A. radon B. acid rain C. smog D. ozone hole

Environmental & Atmospheric Sciences

Which of the following features is created at a divergent plate boundary?

A) mountain building at the margin of the continent B) oceanic trench C) subduction zone D) continental crust E) rift valleys

Environmental & Atmospheric Sciences

Which horizon may accumulate minerals that are not present in the parent material?

A) A horizon B) O horizon C) E horizon D) B horizon

Environmental & Atmospheric Sciences