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Siliceous Ooze (Substrate Subclass)

Component: Substrate

Unique Identifier: 318

Substrate Origin Biogenic Substrate
Substrate Class Ooze Substrate
Substrate Subclass Siliceous Ooze
Substrate Group Diatomaceous Ooze
Radiolarian Ooze

Definition Oozes that are formed primarily from the silica-based tests, frustules, or shells of diatoms, radiolarians, or other siliceous plankton. Due to the chemistry of deep ocean waters, these are the most abundant oozes at ocean depths > 5 kilometers. Carbonate oozes dissolve in the colder, more acidic waters that are generally found deeper than 4 or 5 kilometers, but siliceous oozes do not dissolve in most ocean waters.