Which of the following geologic materials usually has the highest permeability?

A. vesicular volcanic rock
B. loosely cemented gravel and sand
C. shales and similar types of rocks


Answer: B

Environmental & Atmospheric Sciences

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The wind-chill index takes into account the wind speed at about ____ above the ground instead of the where official readings are usually taken

a. ?10 m (33 ft) b. ?5 m (16.5 ft) c. ?100 m (330 ft) d. ?1.5 m (5 ft) e. ?15 m (50 ft)

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