Rock units can be correlated best by examining ____
A)fossil data, rock types, and key beds
B)the presence of oil, rock sequence, and key beds
C)rock type, rock sequence, and the current environment
D)key beds, rock type, and the current environment
E)fossil data, rock type, and the presence of oil
A
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The 500 mb pressure patterns displayed would bring ________ to Texas and the High Plains.
A) zonal flow, which neither suppresses nor supports storms,
B) a trough of low pressure, supporting storm formation,
C) a ridge of high pressure, suppressing storm formation,
D) zonal flow, supporting storm formation,
A delta forms when
A) ocean waves, especially during storms, pile up sediment along the coast. B) a steep mountain front collapses sending sediment out into the sea. C) a river slows and deposits sediment as it enters a lake or sea. D) windblown dust slides down steep hillsides and into a lake.
Most Africans make their living from the following except
A. herding B. cultivating C. manufacturing D. hunting
Which important agricultural substance comes from the atmosphere?
a. nitrate b. phosphate c. potassium d. potash e. calcium