Any easily identified fossil with a wide geographic distribution and short geologic range; useful

for determining relative ages of strata in different areas:a.
guide fossil d. series
b. trace fossil e. conformable
c. system


A

Environmental & Atmospheric Sciences

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Which feature on this figure is formed by the melting of the mantle above the slab?



A) A
B) B
C) C
D) D
E) E

Environmental & Atmospheric Sciences

Langmuir circulation occurs only ____

a. at the equator b. in the top 20 meters of water c. below 100 meters of water d. at deep-ocean depths e. below the pycnocline

Environmental & Atmospheric Sciences

What changes are caused by the Southern Oscillation in the Pacific Ocean?

a. Trade winds blow from east to west. b. Low pressure builds in the western Pacific. c. Trade winds blow from west to east. d. High pressure builds in the eastern Pacific. e. Equatorial currents move faster.

Environmental & Atmospheric Sciences

There is no evidence in the geologic record that multi-celled organisms of any kind existed prior to the Cambrian

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences