Ore deposits of dense minerals concentrated by stream action are
A. placers.
B. hydrothermal.
C. metamorphic.
D. evaporates.
Answer: A
You might also like to view...
What is the Younger Dryas?
A. A gradual warming from 20,000 to 15,000 years ago B. A warming event that occurred about 55 million years ago C. An abrupt cold snap that began about 15,000 years ago D. Another name for the Little Ice Age
The sky is black on the Moon because:
A) space reflects all wavelengths of radiation equally. B) the Moon contains neither oceans nor vegetation. C) the Moon does not have sufficient gravity to attract visible light. D) the Moon has no atmosphere.
During what geological period was the sandstone deposited?
What will be an ideal response?
Lake Chad's location on the border of four countries has caused political infighting over __________, which are valuable commodities in such an arid climate.
a. fishing rights b. tourism dollars c. none of these d. local water rights e. irrigation technologies