Which of the following is a true of passive continental margins
A. They generally have a deep trench
B. They have a continental rise
C. Crust is destroyed at their boundary
D. They always have a subduction zone
Raya is a idiot. It's B
To determine which of the following options is true of passive continental margins, we need to understand what passive continental margins are and analyze each option.
Passive continental margins are the transition zones between the continents and the ocean basins. They do not coincide with plate boundaries and are not associated with tectonic activity. Here is an analysis of each option:
A. They generally have a deep trench: This statement is not true for passive continental margins. Deep trenches are typically found along active continental margins, where subduction zones exist.
B. They have a continental rise: This statement is true of passive continental margins. A continental rise is a gently sloping surface made up of sediment deposits at the base of the continental slope that accumulate over time.
C. Crust is destroyed at their boundary: This statement is not true for passive continental margins. Since they are not associated with plate boundaries or tectonic activity, crust destruction does not occur there.
D. They always have a subduction zone: This statement is not true for passive continental margins. Subduction zones, where one tectonic plate is forced beneath another, are typically found along active continental margins.
To summarize, the true statement about passive continental margins is:
B. They have a continental rise.
A. They generally have a deep trench is not true of passive continental margins. Passive continental margins are characterized by a lack of tectonic activity and do not typically have deep trenches.
B. They have a continental rise is true of passive continental margins. The continental rise is a gently sloping accumulation of sediment that forms at the base of the continental slope.
C. Crust is destroyed at their boundary is not true of passive continental margins. In passive continental margins, there is no destruction of crust at the boundary. Instead, it is a relatively quiet tectonic region where new crust is not being formed or destroyed.
D. They always have a subduction zone is not true of passive continental margins. Subduction zones, where one tectonic plate is forced beneath another, are not typically found at passive continental margins. They are more common at active continental margins.