17. In 1963 Vine and Matthews proposed a mechanism for a. How rocks acquire a ma

Question

17. In 1963 Vine and Matthews proposed a mechanism for a. How rocks acquire a magnetic orientation or what is now called the field of paleomagnetism b. How the Earth's magnetic field reverses c. Subduction zones. d. Sea floor spreading. 18. An example of a passive margin is? a. Japan b. Virginia c. Iceland d. Northern India 19. Name three types of a clastic rock 20. Name three types of chemical rocks 21. Alluvial fans linking together to form a single surface is calleda a. Talus slope b. Alluvial planar surface c. Stadial front d. Bajada 22. (6 pts). Name the six of the seven major tectonic plates

Explanation / Answer

Question 17: In 1963 vine and Matthews proposed mechanism for?

Answer: [D] SEA FLOOR SPREADING

Explanation: Sea floor spreading is the mechanism by which new oceanic lithosphere is created at and also moves away from divergent plate boundaries. Sea floor spreading got its recognition in the year 1963 by Vine and Matthews.

Question 18: An example of passive margin is?

Answer: [B] VIRGINIA

Explanation: A passive margin forms by sedimentation above an ancient rift and found on East coast of America (Virginia) which is tectonically stable with few earthquakes and no volcanoes.

Question 19: Name three types of clastic rock?

Answer: SANDSTONE, SHALE, CONGLOMERATE

Explanation: Clastic rocks are formed when broken pieces of other rocks are squeezed together and grouped by size of rock fragments.

Question 20: Name three types of chemical rocks?

Answer: DOLOMITE, LIMESTONE, CHERT.

Explanation: Rocks formed when minerals usually dissolve in a crystallize solution due to dry climate forming a large mineral deposit.

Question 21: Alluvial fans linking together to form single surface is called?

Answer: [D] BAJADA

Explanation: Alluvial fans merge together with other fans to form apron structures along mountain fronts.

Question 22: Name six of the seven major tectonic plates.

Answer:

1. EURASIAN PLATE

2. PACIFIC PLATE

3. INDO-AUSTRALIAN PLATE

4. AFRICAN PLATE

5. ANTARCTIC PLATE

6. AFRICAN PLATE

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