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Sea Floor Sediments Bronx Style
100

Sediments made from rocks on the continents

What is terrigenous?

100
These are microscopic hard parts of single celled surface living organisms.
What are oozes?
100

Which sediment type is derived directly from the physical and chemical weathering of continental rocks?

Lithogenous

100

Calcareous oozes are primarily composed of which chemical compound?

Calcium Carbonate

100

Underwater landslides along continental slopes create layered sediment deposits known as:

Turbidites

200

At what general ocean depth threshold does the Calcium Carbonate Compensation Depth (CCD) typically occur?

4,000--5,000 meters

200
Forminifera have shells made of this
What is calcium carbonate CaCo3
200
These sediments have the finest grain
What are clays?
200

At what general ocean depth threshold does the Calcium Carbonate Compensation Depth (CCD) typically occur?

4,000--5,000 meters

200

Which single-celled protozoans produce hard tests made of silica (SiO2)?

Radiolarians

300

These sediments are also called oozes

What is biogenous?

300
Carbonate oozes do this below 4000m
What is dissolve?
300

  1. A deep-sea sediment deposit is classified as an ooze if it contains at least what percentage of microscopic biogenous remains by weight?

30%

300

Why do cosmogenous sediments make up less than 1% of all sea floor sediment deposits?

The influx rate from space is extremely small and heavily diluted by terrestrial and biological inputs.

300

Where on the ocean floor would you expect lithogenous sediment thickness to be the greatest?

Along continental margins and near major river mouths

400
These sediments were created in space.
What are cosmogenous
400
Radiolarians and Diatoms are both examples of
What is siliceous ooze
400

Neritic sediments are found

What is on the continental shelf

400

Which grain size would you expect to find closest to shore in high-energy coastal environments?

Coarse sand and gravel

400

 Explain the chemical and biological differences between calcareous ooze and siliceous ooze.

Calcareous ooze is composed of calcium carbonate (CaCO3) produced by organisms like foraminifera or coccolithophores. 

Siliceous ooze is composed of silica (SiO2) produced by organisms like diatoms or radiolarians.

500
This type of sediments cover the greatest amount of sea floor
What are biogenous.
500

Calcium carbonate sediments form by

What is precipitation

500

Which microscopic photosynthetic algae are responsible for forming siliceous ooze?

Diatoms

500

Extremely fine lithogenous particles that drift into the deep ocean and settle very slowly over millions of years form

Abyssal Red Clay

500

Why do calcareous oozes rarely accumulate on the sea floor below the CCD?

High water pressure, low temperature, and acidity cause calcium carbonate to dissolve.