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Question Marathons Explained

Which of the following is not a characteristic of a continental-continental convergent boundary?
a. Mountain building
b. Strong earthquakes
c. Arc volcanism
d. None of the above

When seismic waves from earthquakes reach the boundary between the mantle and liquid outer core:
a. all of the body waves get refracted
b. all of the body waves get reflected, but none are refracted
c. all P-waves stop because they are unable to move through the outer core
d. all S-waves vanish because they cannot move through a liquid

Magmas that feed island-arc volcanoes:
a. are a result of decompression melting within Earth’s mantle
b. occur over very wide zones thousands of kilometers in width
c. are located near continental-oceanic boundaries due to magma generation in the Benioff Zone
d. rise along transform faults associated with nearby divergent boundaries

All of the following are features associated with Pangaea except:
a. Panthalassa Ocean
b. Iapetus Ocean
c. Tethys Sea
d. Gondwanaland

If a rock deforms under the influence of a stress, but then returns to its original shape when the stress
is removed, then the deformation behavior is described as:
a. brittle
b. plastic
c. elastic
d. ductile

What happens when an oceanic crust plate (A) converges with a continental crust plate (B)?
A. When they converge B goes under A
B. They create a mountain
C. When they converge A goes under B
D. None of the above

Soccerpr0 wrote: ↑November 7th, 2023, 6:20 am What happens when an oceanic crust plate (A) converges with a continental crust plate (B)?
A. When they converge B goes under A
B. They create a mountain
C. When they converge A goes under B
D. None of the above

Firstly, I think you're supposed to answer the previous question before posting yours


Oceanic crust will A subduct under the continental crust


Well, here are my questions:

1. How many times more powerful is a magnitude 8.0 earthquake than a 4.0 earthquake?

2. Explain two major reasons why Wegener's theory of tectonic plates was first disputed

3. What do disconformities imply?

treesdea wrote: ↑December 5th, 2023, 9:00 am

Soccerpr0 wrote: ↑November 7th, 2023, 6:20 am What happens when an oceanic crust plate (A) converges with a continental crust plate (B)?
A. When they converge B goes under A
B. They create a mountain
C. When they converge A goes under B
D. None of the above

Firstly, I think you're supposed to answer the previous question before posting yours


Oceanic crust will A subduct under the continental crust


Well, here are my questions:

1. How many times more powerful is a magnitude 8.0 earthquake than a 4.0 earthquake?

2. Explain two major reasons why Wegener's theory of tectonic plates was first disputed

3. What do disconformities imply?

I like these questions

1. A magnitude 8.0 earthquake is 10,000x more powerful (solution: 10⁴). 2. Idk, probably seemed a bit outlandish because of the timescale. 3. They imply phase changes of the Earth’s interior, including material changes and solid-to-liquid changes.
My questions
1. A black smoker primarily emits what sort of mineral?

2. Which of the following discontinuities involve slowing down seismic wave speeds?
A. Conrad Discontinuity
B. Mohorovicic Discontinuity
C. Repiti Discontinuity
D. Lehmann Discontinuity

3. A material has a density of 2.7 g/cm³, a bulk modulus of 50 GPa, and a shear modulus of 24 Gpa.
A. What is the velocity (m/s) of the P-wave that would travel through it?
B. What is the likely identity of this material?
Yes i based this off of the Mason invitational