How do calcareous oozes form?
A) The particles settle out from calcite- rich turbidity currents at depths greater than 4,500 metres.
B) The particles are precipitated in the water column below the depth of sunlight penetration and then sink to the bottom.
C) The particles are precipitated by deep- ocean, bottom- dwelling, carbon- fixing bacteria.
D) The particles are biogenically or chemically precipitated in warm, surface waters and sink to the bottom.

Question

Quizplus · Accepted Answer

Calcareous oozes form primarily from the accumulation of calcium carbonate shells and skeletons of marine organisms. These organisms, such as foraminifera and coccolithophores, live in warm, surface waters. After these organisms die, their calcareous parts sink to the ocean floor, forming ooze. This process does not involve precipitation in the water column below the depth of sunlight penetration, turbidity currents, or the action of deep-ocean bacteria.

How Do Calcareous Oozes Form