Divergent plate boundaries are present under continents during the early stages of continental breakup. When magma wells up beneath a continent, the crust is initially elevated, stretched, and thinned, producing ___________________ _.
Fill in the blank(s) with correct word
Question 2
Index, or guide, fossils are most useful because they ____.
A)occur over small geographic region
B)lived during a brief period of geologic time
C)rarely occur
D)lived over a long period of geologic time
E)are found in all types of rock
A Typical Pattern of Sleep Stages During a Single Night
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A thin laser beam traveling in air strikes the surface of a glass plate at 41.2° with the ...
Opener Colored scanning electron micrograph of two prostate cancer cells in the final stages of cell