Question

multiple choice question
depending on the chemical composition of the tests within them, pelagic sediments with over 30% biogenous materials are known as either calcareous or siliceous _______.

○ ooze
○ mud
○ dust

Explanation:

Pelagic sediments with over 30% biogenous materials are classified as ooze, and they can be calcareous (composed of calcium carbonate - based tests) or siliceous (composed of silica - based tests). Mud and dust do not fit this definition related to biogenous pelagic sediments with that composition.

Answer:

A. ooze