You are asked to make an artificial sediment sample that could be classified as an ooze and weighs 1000g. You are given terrigenous sediment and calcareous (calcium based) material to mix together. How much calcareous material do you need to use to make an ooze?

30% of calcareous material is needed to make an ooze.

Explanation:

The calcareous ooze is one of the distinct and common types of pelagic sediments that are mainly comprised of about 30% of calcareous substances, and that is very fine-grained in nature. These are dominant in calcareous shells, that are mostly the shells of coccoliths and foraminiferous, and are typically intermixed with the mud and clay. These are the most common type of pelagic sediments, that covers nearly 50% of the seafloor, including the abyssal plain.

Therefore, 30% of the total composition is required in order to make an ooze.