Ccd refers to the ocean depth at which calcium carbonate is present only in solution. 1. true 2. false

1. True

Explanation:

From a certain depth, most of the carbonates dissolve, but the shells of the most resistant foraminifera do not. It is the LISOCLINE .

From a certain depth, carbonates and microfossils dissolve completely beyond lysocylin. It is the CALCITE COMPENSATION LEVEL (CCD) .

In areas deeper than the CCD, only clay or siliceous sediments are deposited and carbonates and carbonated fossils are absent .

Lysocline and CCD vary in depth today in each ocean, being greater in the tropical belt (up to 5000 m) . The CCD for the same latitude has varied throughout geological time .

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for e2020 ; -;