Consider the structural characteristics of ocean basins: Statement I: Abyssal plains are expansive, flat regions located on the deep ocean floor, typically lying at depths between 3,000 and 6,000 meters. Statement II: Continental shelves represent the steep, precipitous drop-off zones connecting the shallow coastal waters directly to the oceanic trenches. Which of the following is correct?

💡 Solution & Explanation

Abyssal plains are indeed vast, nearly flat areas covering extensive portions of the deep ocean floor at depths ranging from 3,000 to 6,000 meters, formed by thick layers of marine sediment smoothing out underlying rugged topography. Statement II is incorrect because the continental shelf is a relatively shallow, gently sloping platform extending from the coast, whereas the steep drop-off connecting it to the deep ocean floor is known as the continental slope. Oceanic trenches are distinct tectonic depressions found in subduction zones.