Placers are sedimentary deposits where valuable minerals have been hydraulically sorted. Which of the following mineral properties are required for hydraulic sorting by streams to be effective?
A. high solubility and high density
B. small grain size and well-rounded shape
C. large grain size and high solubility
D. high density and high chemical resistance
E. well-rounded shaped and high chemical resistance
Answer: D
Environmental & Atmospheric Sciences
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