They lie off Japan, the Western Pacific Islands, the west coast of South America, the Aleutian Island Chain, as just a few examples. Label one area that is considered an abyssal plain. Abyssal plains are flat regions of the ocean floor that lie between the continental shelf and the mid-ocean ridges. They are most common in the Atlantic and least common in the Pacific. Label a continental margin.
Every continent has a continental margin, some are wider than others.
I accepted any shoreline. Indicate where you would find biogenous deposits and indicate whether those biogenous deposits would be calcareous or siliceous. Biogenous deposits are shown in Figure 5.8. From the figure, you can see that calcareous oozes are most common in the Atlantic and not found at all in the Northern Pacific. Siliceous sediments are found in colder waters, i.e. those at higher latitudes and along the Pacific equator.