11. Which zone is the upper crust through which hot water has circulated and in

Question

11. Which zone is the upper crust through which hot water has circulated and in which many metal ores can be found? A. hydrothermal B. magmatic C. disseminated D. placer 12. What causes the tides? A. wind B. seismicity C. ocean currents D. gravity 13. Diamonds have been found in which type of deposit? A. placers B. banded formations C. manganese modules D. stratiform deposits 14. What is the movement of sand grains parallel to a beach called? A. wave refraction B. turbidity current C. longshore drift D. ebb tide 15. Which is necessary for the formation of peat? A. humidity B. mineral deposits C. heat D. cold

Explanation / Answer

11)B- magmatic

12)D- gravity

13)A- placers

14)C- longshore drift

15)C- heat is needed to the decay material for producing the peat, which is kind of coal

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