Oceanography Chapter 4
The type of marine sediment that forms the thickest deposits worldwide is:
Neritic, lithogenous sediment deposits
Pelagic clays contain lots of material that settles to the seafloor through the water column and are:
less than 30% biogenous material
Sediments found on continental margins are called:
neritic
The study of how the ocean, atmosphere, and land have interacted in the past to produce changes in ocean chemistry, circulation, biology, and climate is called
paleoceanography
The term referring to the size and shape of sediment particles is
texture
Abyssal clay is an example of which of the following sediment types?
Lithogenous Sediment
Glacial deposits are an example of which of the following sediment types
Lithogenous Sediment
Terrigenous sediment is another name for which of the following?
Lithogenous Sediment
Sediments that are poorly sorted were most likely deposited by:
A glacier
The number of organisms present in the surface water above the ocean floor is called
Productivity
Sediments produced by plants and animals in the sea are called:
biogenous
The dissolution of the thick tests of foraminifers below the CCD is an example of the _____ of biogenous sediment
destruction
The deposition of coarse-grained lithogenous material in neritic environments along continental margins is an example of the _____ of biogenous sediment
dilution
What percentage of the rocks exposed on the continents originated as sedimentarty rocks deposited in ancient ocean environments
More than 50 percent
Calcite dissolves more readily in seawater that is ________ in temperature and ________ in pressure.
Colder; higher
Sediments with an extraterrestrial origin are called:
Cosmogenous
Which of the following is a biogenous sediment A)Beach Sand B)Diatom ooze C)Glacial Deposits D)Clays
B)Diatom ooze
Which of the following contain calcium carbonate (CaC03) A)Diatoms B)Foraminiferans C)Radiolarians D)Phosphorites
B)Foraminiferans
Which of the following contains silica (SIO2) A)Coccolithophores B)Radiolarians C)Forminiferans D)Phosphorites
B)Radiolarians
High-energy environments are most likely to deposit which one of the following? A)Clay-sized particles B)Cosmogenous Sediments C)Large particles such as gravel D)Silt-sized particles
C)Large particles such as gravel c
Which of the following is a biogenous sediment A)Evaporites B)Halites C)Manganese nodule D)Phosphates E)Stromatolites
E)Stromatolites
Sediments produced because of chemical reactions in seawater are called:
Hydrogenous
Sediment that begins as rock on continents or islands is called
Lithogenous (terrigenous) Sediment
Turbidite deposits are an example of which of the following sediment types?
Lithogenous sediment
Calcium Carbonate is most likely to dissolve in water with which Characteristics
Lots of carbon dioxide and colder temperatures
Ocean sediments consist of particles that have slowly settled out of the water by which of the following the processes?
Suspension settling