What type of rocks can usually be found in alluvial-fan environments?
a. Arkose
b. Conglomerate
c. Travertine
d. Breccia
e. Both a and b
Ans: e. Both a and b
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A) plankton B) nekton C) hadal D) benthic
In the United States, what 20th century trend is being somewhat reversed in the 21st century concerning Central Business Districts?
A) Finance institutions are returning to the CBD. B) People are returning to live in the CBD. C) Rent is becoming cheaper again in the CBD. D) The CBD is now the focal point for the CBD. E) Business services have returned to the CBD.
When talking about plate tectonics, which of the Earth's layers comprises the plates?
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