OCE1001 Chapter 4

The most likely place to find abundant manganese nodules is on the

Abyssal Plain far from a continent

Ocean sedimets provide all the following mineral resources except

Coal

Sediments with an extraterrestrial origin are called

Cosmogenous

Calcareous ooze is found in cooler eaters at depth around the world

False

Radoliarian tests are dissolved beneath the carbonate compensation depth

False

Which of the following contains calcium carbonate (CaC03)

Foraminiferans

Sediment that begins as rocks on continents or islands is called

Lithogenous (terrigenous) sediment

Calcium carbonate is most likely y to dissolve in water with which characteristic?

Low salinity

Sediments found on contenetal margins are called

Neritic

Organisms that live on the ocean floor may be responsible for keeping manganese nodules from being buried in the sediment

True

Texture refers to the size and shape of sediment particles

True

The organisms that contribute to biogenous sediment are chiefly algae and protozoans

True

ice rafting

associated with glacial deposits

Turbidite

associated with submarine canyons and deep sea alluvial fans

Coccolithophores

biogenous sediment

Siliceous ooze

biogenous sediment

tektites

cosmogenous sediment

Metal sulfides

hydrogenous sediment

halite

hydrogenous sediment

Sediments derived from pre-existing rocks on lad are called:

lITHOGENOUS

pelagic clays contains lots of material that settles to the sea floor through the water column and are

less than 30% biogenous material

All the following are examples of hydrogenous sediment except

stromatolites

The particles found in some sediment that suggests that extraterrestrial impact evets are

tektites

All of the following are true concerning neritic sediment deposits except

they are primarily composed of calcareous deposits of biological origin

Coastal sand dunes are usually well sorted due to winds

true

Tektites are glassy rock fragments created during impact events

true