Sketch a map or just describe the general character of the distribution of the three principle classes of deep sea sediments. Silicaceous ooze form bands around the equator and at high latitudes. Calcareous ooze dominate in the shallower parts of the ocean basins essentially forming meridional strips. These are interspersed with bands of red clay. What is the difference between tectonically passive and active margins.
Passive margins occur on the sides of continents where the crust is diverging.
Sediment accumulates and depresses the crust. Strata remain level. At active margins the crust is converging and subducting. There is vulcanism and earthquakes. Sediment deposits are contorted by compression and earthquakes.