Radiometric dating is based upon

a. the presence of fossils.
b. cross-cutting relationships.
c. spontaneous decay of radioactive elements.
d. superposition.
e. dendrochronology.


C

Environmental & Atmospheric Sciences

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A. Canada B. the United States C. Japan D. South Korea E. European Union

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For a small business the internet tends to blur boundaries

a. industry b. geographic c. skill-dependent d. technological.

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If sedimentary rocks are tilted steeply, they most likely have experienced an episode of deformation

a. True b. False

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Which is denser: a 100-million-year-old oceanic lithosphere near a convergent boundary, a 15-million-year-old oceanic lithosphere near a rift, or the upper part of the asthenosphere?

A) A 15-million-year-old oceanic lithosphere B) 100-million-year-old oceanic lithosphere C) Upper asthenosphere D) They all have the same density.

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