Question

an oceanic plateau
a spreading ridge
a large reef structure
a continental shelf
yes, its the kerguelen plateau and it covers 1.25 million square kilometers.
identify features of the sea floor. 5 of 5
how did this oceanic plateau form?
it is oceanic crust uplifted by a large thrust fault.
it formed from flood basalts associated with a hot spot.
it formed as continental crust detached from the continent at a transform plate boundary.
it formed in an island arc as the volcanic islands fused together.
google earth
data sio, noaa, u.s. navy, nga, gebco
image u.s. geological survey
1127 km
0:24 1x

Explanation:

To determine how the oceanic plateau (Kerguelen Plateau) formed, we analyze the options:

• Thrust faults typically relate to mountain - building in continental crust, not oceanic plateaus, so the first option is incorrect.
• Oceanic plateaus like Kerguelen often form from flood basalts associated with a hot spot. Hot spots can generate large - scale volcanic activity that builds up the oceanic crust into a plateau.
• Continental crust detachment at a transform boundary is not the mechanism for oceanic plateau formation, so the third option is wrong.
• Island arc formation involves subduction - related volcanic islands, not the formation of oceanic plateaus, so the fourth option is incorrect.

Answer:

It formed from flood basalts associated with a hot spot.