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Ocean Sediments (Economically important sediment (Gas and petroleum…

- - - - Siliceous oozes
        
        Made of cold water organisms including diatoms and radiolarians
        
        Have silica in their structures
        
        Are not weaken or dissolved in the presence of acidic ocean water
      - Calcareous oozes
        
        Made of warm water organisms including pteropods, foraminifera, and coccolithophores
        
        Have calcium carbonate in their structures
        
        Are weaken or dissolved in the presence of acidic ocean water
  - - - Evaporites like rock salt left over after water evaporates
      - Precipitates come out of solution like mineral nodules
- - - - Estuaries trap river deposits
  - - - Calcareous ooze dissolves in the presence of acid below the calcium compensation depth (CCD)
  - - - Relict sediments could have been left behind when the sea level was lower
      - Ice rafting can carry larger sediments out