Refer to 3 pdfs: https://drive.google.com/file/d/1f-z_YqwUulAs7JPQwoctyYpGpSum_7

Question

Refer to 3 pdfs:
https://drive.google.com/file/d/1f-z_YqwUulAs7JPQwoctyYpGpSum_7nL/view?usp=drivesdk

https://drive.google.com/file/d/1lwAo5sUnBys7uxBiUWpITMEyqs4Dv8g_/view?usp=drivesdk

https://drive.google.com/file/d/17IBP9PEFoF4gdXbF_imvwwf7H194VAEG/view?usp=drivesdk

Questions 7 through 10: Multiple Choice: Mark the best answer for each question posed below.
7. What does the texture of sample GOT 102 tell you about the rock’s origin?
a. The rock formed from a single phase of slow cooling deep underground.
b. The rock formed from a single phase of rapid cooling at the surface.
c. The rock formed from two phases of cooling slow followed by fast forming
finally as a rock at the surface.
d. The rock formed from cooling and reheating in multiple phases.
e. None of the above asnwers is correct.

8. What does the texture of sample GOT 104 tell you about the rock’s origin?
a. The rock formed from a single phase of slow cooling deep underground.
b. The rock formed from a single phase of rapid cooling at the surface.
c. The rock formed from two phases of cooling slow followed by fast forming
finally as a rock at the surface.
d. The rock formed from cooling and reheating in multiple phases.
e. None of the above asnwers is correct.
9. What does the texture of sample GOT 108 tell you about the rock’s origin?
a. The rock formed from a single phase of slow cooling deep underground.
b. The rock formed from a single phase of rapid cooling at the surface.
c. The rock formed from two phases of cooling slow followed by fast forming
finally as a rock at the surface.
d. The rock formed from cooling and reheating in multiple phases.
e. None of the above asnwers is correct.
10. What does the grain size of sample GOT 112 tell you about the rock’s origin?
a. The rock formed in an environment of low depositional energy.
b. The rock formed in an environment of high depositional energy.
c. The rock formed in an aeolian (wind transported) environment.
d. All of the above answers are correct.
e. None of the above asnwers is correct.

Explanation / Answer

7.This porphyritic texture is formed by two phases of cooling,slow and fast cooling near the surface. Answer is option c.

8.Sample GOT 4 is formed by a rapid cooling at the earth's surface. That produces glassy texture.

9. This texture is formed by two phases of cooling, slow cooling in depths of earth's surface and rapid cooling on coming near to the earth's surface.

10. The solid rocks of larger sizes are usually formed in high energy environment. So the answer is option b.

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