The Columbia River volcanic field can be described as ____
a. andesitic stratovolcanoes
b. voluminous basalt lava flows
c. voluminous rhyolite tuff eruptions
d. granite batholiths
e. layered mafic intrusions
b
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What specifically connects the continental shelves to the deep-ocean floor?
a. Continental rise b. Continental slope c. Shelf break d. Submarine canyon
Carbon-14 dating is based on the ratio of the parent isotope ____________________ to the daughter
isotope ____________________. Fill in the blank(s) with the appropriate word(s).
Obsidian, a variety of volcanic glass, may be black, dark gray, red, or brown, depending on the presence of iron
Indicate whether the statement is true or false
A sequence of changes that reinforces the direction of initial change is known as _______________ feedback
Fill in the blank(s) with correct word