lec 12 up to slide 1-23 Shelf and deep sea habitats
- University of California - Los Angeles
- Ecology And Evolutionary Biology
- Ecology And Evolutionary Biology 109
- lec 12 up to slide 1-23 Shelf and deep sea habitats
Last Modified: 2011-06-26
Related Textbooks:Marine Biology: Function, Biodiversity, Ecology
deepseefloor= less than 1dg
2. Pillow Bassalt
3. Basalt Dikes
2. Winds (eolian)
3. Glaciers (ice-rafted debris, IRD)
5. Sea level changes
Heaviest boulder cobble gravel sand silt clay lightest
2. Earthquake-triggered submarine avalanches
3. High velocity (~50 mph!), erosive events
-Slide of loose sediment triggered by shocks then slide arrested on gentle slope then turbidity current formed from upper layers of slide flows onward.
-Creates high velocity current that transports sediment.
2. 2. Siliceous (SiO2), Radiolaria -- animals, Diatoms -- plants
2. SiO2 is preserved everywhere
3. CaCO3 is variable,
1. reproduction of planktonic organisms
1. silica dissolves only very slowly and is preserved everywhere
2. calcium carbonate depends on T, pH and varies with depth.
3. Rates are variable: <1 to 15mm/1000 yr
2. In today’s ocean this depth (CCD) varies between 3 km (polar) and 5 km (tropical)
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