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Oceanography > Coast > Flashcards

Coast Flashcards

1
Q

Coasts refer to an area that is affected by biological processes in additional to tectonic activity

True or false?

A

True

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2
Q

Coastlines have not come into equilibrium with modern sea levels

True or False?

A

True

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3
Q

Coastal cells in Southern California are smaller due to the location on an active, leading edge of a continent

True or false?

A

True

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4
Q

Seawalls protect property snd decrease beach erosion

True or false?

A

False

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5
Q

Fringing reefs are separated from land by a lagoon

A

False

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6
Q

What is the name given to long-term change in sea level?

A

Eustatic change

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7
Q

What is the name for a coast in which the dominant processes are those that remove coastal materials?

A

Erosional Coast

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8
Q

How much of the United States coastline is considered to be depositional?

A

30%

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9
Q

Which coastline is depositional coast?

A

Florida

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10
Q

Which feature marks the shoreward limit of marine erosion on a rocky coast?

A

Sea cliffs

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11
Q

What is the rate if shore erosion dependent on?

A

Local range of tides

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12
Q

What is a fjord

A

Deep narrow bay modified by glaciers

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13
Q

What type of beach is likely to exist on coastline covered with sea caves?

A

erosional beach

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14
Q

An erosion coast that has little tidal variation

A

Can erode quickly because wave action is concentrated near one level for long times

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15
Q

What is true of backshore?

A

It can include dunes and grasses

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16
Q

What is usually the highest point on a beach?

A

Berm crest

17
Q

What is a coastal cell?

A

A section of coastline that has balanced input and output of sand

18
Q

What is responsible for increasing beaches’ slope

A

The swash

19
Q

What is the eventual fate of an erosional beach?

A

They become a depositional beach

20
Q

What creates a moraine?

A

Glaciers

21
Q

What type of depositional feature migrates slowly landward as sea levels rise?

A

Barrier island

22
Q

What is a tombolo?

A

A bridge of sediment that connects to a sea island to a mainland

23
Q

Barrier islands are?

A

Parallel but separate from land

24
Q

Where do most of the atolls on earth exist?

A

Pacific Ocean

25
Q

Which of the following are formed when longshore currents slows?

A

Sand spits

26
Q

How have parts of Florida’s coast been extended

A

Mangroves

27
Q

What type of estuary is characterized by rapid river flow and low tide range?

A

Salt wedge estuary

28
Q

Where does most of the sediment on the Pacific coast originate from?

A

Granite rock

Oceanography (2 decks)

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