LD - Lecture 2

Question 1

What is seafloor morphology?

Answer 1

Study of the formation, alteration and configuration of seabed features and relationship with underlying ecology

Question 2

Enodgenic forces (internal) (3)

Answer 2

Earths core, mantle convection, plate tectonics

Question 3

Exogenic forces (External) (4)

Answer 3

Weathering, Oceans (waves, tides, currents), Ice (glaciers and sea ice), Sunlight

Question 4

Continental Margins

Answer 4

Interface between continental and oceanic crust

Question 5

How much of the ocean and earths surface do continental margins cover?

Answer 5

28% of oceans, 11% of earths surface

Question 6

Where are active margins found?

Answer 6

Convergent plate boundaries

Question 7

Where are passive Margins found?

Answer 7

Tectonic plate boundary

Question 8

What are active margions caused by?

Answer 8

Plate Tectonics

Question 9

What are passive margins caused by?

Answer 9

Exogenic forces

Question 10

What is Progradation?

Answer 10

Glacier movement which pushes sediment which extends the continental shelf.

Question 11

Where do deep sea fans form?

Answer 11

Bottom of continental slope of passive margins

Question 12

Features of deep sea fans?

Answer 12

large scale deposition, graded sediment sizes

Question 13

Features of active margins? (2)

Answer 13

Steep slope. accretionary wedge

Question 14

What is an accretionary wedge?

Answer 14

Wedge shape found at convergent boundaries made up of mixed sediment.

Question 15

How are guyots formed?

Answer 15

Fla top sea mounts created by wave action shaving off top.