The principle of original horizontality means that sedimentary rocks have not been
A) folded.
B) lithified.
C) eroded.
D) metamorphosed.
A) folded.
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The great scramble for African colonies occurred
A) just after the Napoleonic wars. B) during Portugal's domination of the world-system. C) as Spain was colonizing the America's. D) in the three decades preceding World War I. E) in the two decades after World War II.
In 1811 and 1812 three large earthquakes (Magnitude 7.7, 7.5, 7.7 ) hit the New Madrid area near what is now St. Louis, Mo and Memphis, TN
If those cities had their current population and infrastructure when those earthquakes occurred, hundreds of thousands of people might have been killed or injured. Should that region have essentially the same types of building codes and rules that exist in California and Japan today despite the fact that there have not been any large earthquakes in the area since 1812 and it is not located near a plate boundary?
Which of the following is represented by the eyewall in a hurricane?
A. a region of light winds and low pressure B. the exact centre of the storm C. the area of broken cloudiness at the centre of the storm D. a zone of intense thunderstorms around the centre of the storm
The time interval for the Hadean Eon is 4.57~3.85 Ga.
a. true b. false