Thus, calcareous ooze indicates past water depth, chemistry and temperature. When calcareous ooze becomes lithified, it forms chalk . Diatoms Single-celled phytoplankton that secrete siliceous hard parts. Live in cool waters at high latitudes. Abundant in upwelling regions.
Siliceous ooze is abundant at high latitudes and regions characterized by strong upwelling .
Recrystallizes to the rock chert Other Pelagic Sediments Deep-Sea Clay Formed from weathering of continents, usually masked by other ocean sediments. Abundance and distribution is an indicator of the distribution of arid areas, position of wind belts, and wind strength. Ice-rafted debris Course material transported by icebergs. Indication of wasting of glaciers. Oxygen-18 has two more neutrons than oxygen 16.