Earthquakes and volcanism are found directly along this almost always submerged

Question

Earthquakes and volcanism are found directly along this almost always submerged plate boundary. It is a line along which continents have been separated from one another Select one: a. Transform Boundary b. Continent-Continent Convergent Boundary c. Continent-Ocean Convergent Boundary d. Ocean-Ocean Convergent Boundary e. Divergent Boundary This plate boundary can be found in either continental or oceanic crust. Earthquake epicenters are generally found directly along its boundary line. Volcanism is not unheard of along this type of boundary, but it is uncommon. Select one: a. Transform Boundary b. Continent-Continent Convergent Boundary c. Continent-Ocean Convergert Boundary e. Divergent Boundary

Explanation / Answer

Answer 1:

e. Divergent boundary. At this boundary, two plates move away from each other due to a pull that they experience on their other end (at the trenches). This diverging movement forms openings in the crust that allows magma from the upper mantle to ooze out onto the crust. Any movement in the tectonic position of these two plates can cause seismic activity (earthquakes). Currently, this boundary is seen as the Mid-Oceanic ridges which are located underwater.

Note: Earthquakes and volcanism are also a common occurrence at convergent boundaries with subduction zones but their intensity and form will be different. Since this question specifies that the plates move away from each other, the answer is Divergent boundary.

Answer 2:

a. Transform Boundary. Transform boundaries are formed where two crustal plates are sliding past each other horizontally on the surface of the earth. This ‘slide’ of two crustal plates can cause a zigzag boundary of a plate to interlock with another plate which in turn can create a high pressure zone. This pressure is released over time causing earthquakes that have a shallow Focus (since this movement occurs only at the surface of the crust and does not affect the lower crust/upper mantle). The best example of this type of boundary is the San Andreas fault.

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