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Marine Science > Marine Geology > Flashcards

Marine Geology Flashcards

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0
Q

Primary Coasts

A

Young coasts in which terrestrial influences dominate. Jagged and irregular shape

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1
Q

Shorelines Unstable

Why?

A

Constant changing sand

Because waves and their tides

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2
Q

Secondary Coasts

A

Older and are straight due to shoreline straightening

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3
Q

CCD

A

Calcium carbonate compensation depth; 4,000 meters

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4
Q

Oozes

A

Deep sea sediments with 30% biogenous material

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5
Q

Sediments smallest to largest

A

Clay, silt, sand, granule, pebble, cobble, boulder

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6
Q

Problem with east and west coast

A

Not as much land because of melting icebergs

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7
Q

Protect from human interference

A

Groin, jetty, sea well, dredging

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8
Q

P Waves

A

Primary seismic, pass through solid and liquid, similar to sound waves, faster than S waves

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9
Q

S waves

A

Secondary seismic, cannot travel through liquids, don’t go through the core

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10
Q

How are P waves and S waves alike?

A

Produced earthquakes, can travel through solids

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11
Q

Decay of radioactive elements causes what?

A

Center of earth to be very hot

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12
Q

Oceanic crust is more or less dense because it is made of basaltic rock?

A

More dense

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13
Q

New rock found? As you move farther away what happens to the land

A

Spreading centers. As you move farther away, it gets older and thicker

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14
Q

Subduction zone

A

Old sea floor is destroyed

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15
Q

Divergent
Convergent
Transform

A

Plates move away
Plates move towards eachother
Plates move past eachother

16
Q

Terrigenous
Biogenous
Hydrogenous
Cosmogenous

A

From nearby land masses
From organisms
Precipitated directly from seawater
From space

17
Q

Cross section of planet from top to bottom

A

Crust, mantle, core

Lithosphere, Asthenosphere, Mesosphere, Outer Core, Inner Core

18
Q

Beach Profile

A 
A. Secondary Dune
B. Primary Dune
C. Berm
D. Berm Crust
E. Scarp
F. Low Tide Terrace
G. Longshore Bar
H. Longshore Trough
I. Back shore
J. Foreshore
K. Offshore
19
Q

Convection Cell

A

The “lava” current. The current moves and the land moves away

Marine Science (4 decks)

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