Tephra is the same as ____

a. lava
b. pyroclastic material
c. mudflows
d. aa


b

Environmental & Atmospheric Sciences

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Because of unconformities, the geologic record at any given location is incomplete. In other words, no one locality on Earth can provide a complete record of our planet's history.

a. true b. false

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What is the average rate of seafloor spreading in modern oceans?

What will be an ideal response?

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Plastic deformation occurs more readily in warm rock than in cool rock.

a. true b. false

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The worldwide mineral demand is more than mineral supply.

a. true b. false

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