Sediments & Coastal Processes

Sediments that originate from organisms are called

• Lithogenous

• Biogenous

• Hydrogenous

• Cosmogenous

You have arrived at a coast with sea stacks, cliffs, and small pocket beaches. What type of coast is this?

• Erosional

• Depositional

• Isostatic

• Remnant

If I river delta is to grow in size, _________ must exceed _________.

• Erosion, deposition

• Deposition, erosion

• Eustatic processes, tectonic processes

• Primary processes, secondary processes

What type of coast has wide sandy beaches that you can drive on?

• Erosional

• Depositional

• Isostatic

• Remnant

• Eustatic

Sediments are classified by size based on their ________.

• Diameter

• Length

• Weight

Continental shelf sedimentation is strongly controlled by what?

• Tides, waves, and currents

• Human beings

• The effect of oozes

The rate of continental shelf sedimentation is generally __________ deep ocean sedimentation

• Faster than

• Slower than

• Equal to

• Dependent upon

Ocean sediments are economically important if:

• They can be easily mined

• They are found as nodules

• They are found in very deep water

• The cost of mining is less than the economic value of the sediment

An evaporite _______.

• Settles to the seafloor to be mined

• Forms when water evaporates and leaves it behind

• Forms when deep ocean sediments are uplifted

• Falls from the atmosphere

_______ coasts form from processes not directly related to the ocean.

• Active

• Passive

• Primary

• Secondary