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

Environmental & Atmospheric Sciences

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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).

Environmental & Atmospheric Sciences

What specifically connects the continental shelves to the deep-ocean floor?

a. Continental rise b. Continental slope c. Shelf break d. Submarine canyon

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences

A sequence of changes that reinforces the direction of initial change is known as _______________ feedback

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences