UGC NET JRF Environmental Sciences December 2025 | Q30 | #ugcnet #ugcnetjrf #netjrf #shorts #viral

Added: 2026-05-22

[00:00:00]Hello students, welcome to our channel.

[00:00:02]Now let's solve question number 30. And question number 30's topic is plate tectonics and the formation of accretionary prism or wedge at subduction zones. The question asks, "Along which plate boundary interaction does an accretionary prism form?" Let's quickly analyze the options. Mid-oceanic ridges are divergent boundaries where plates move apart, so no accretionary prism forms there. Transform boundaries involve horizontal sliding motion again without subduction.

[00:00:29]Continent-continent convergence mainly causes mountain building after collision, not accretionary prism formation. Now comes the correct option, ocean-continent convergence boundary.

[00:00:39]Here the denser oceanic plate subducts beneath the continental plate. During subduction, sediments from the oceanic plate are scraped off and accumulate near the trench. These sediments pile up to form a wedge-shaped structure called the accretionary prism. So the correct answer is option D, ocean-continent convergence boundary. Key takeaway here is accretionary prisms are characteristic features of subduction zones and are formed due to sediment scraping and accumulation. So keep learning, keep growing, and see you in the next question number 31.

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