GEO 230 EXAM 3 QUIZZES

Question 1

What is the general name of the body of water to the left of this shoreline feature?

Answer 1

Lagoon or barrier island lagoon

Question 2

What is the direction of longshoremen drift? To the N or to the S?

Answer 2

South (because sand is accumulating on the N side, and eroding on the S side of groins)

Question 3

What is the general specific name for this shoreline feature?

Answer 3

Delta or river delta (specifically a birds foot delta)

Question 4

What is the generic name for this channel?

Answer 4

Distributary

Question 5

Name the feature

Answer 5

Sea stack

Question 6

Name be feature

Answer 6

Coastal headland

Question 7

Is this erosional or depositional shoreline?

Answer 7

Erosional coastline (b/c of rocks)

Question 8

Is his erosional or depositional shoreline?

Answer 8

Depositional

Question 9

Name be types of estuaries based in geologic origin

Answer 9

Glacier cut/fjord: middle line
Tectonic estuary: looks like a plate
Costal plain/flooded river valley: middle w/ things coming off it
Bar-built estuary: looks like an H

Question 10

What is illustrated by the blue arrows in this figure?

Answer 10

The net offshore flow of ocean water driven by Ekman transport which ultimately results in upwelling

Question 11

Why are these areas of exceptionally high biological productivity?

Answer 11

The upwelling that the offshore flow drives brings nutrients to the surface

Question 12

What is illustrated by the ocean color shading in this figure?

Answer 12

The shading shows the distribution of photosynthetic pigments (chlorophyll) that we use as a representation of global patterns in Net primary production

Question 13

What are the two most important coastal wetlands?

Answer 13

Salt marshes & mangrove swamps

Question 14

Shown in this diagram are curves for oxygen and phosphorus concentrations with depth. Which curve is A and which is B? Explain the reasons for each curve.

Answer 14

A is oxygen & B is phosphate
The rationale is at the surface where photosynthesis is happening, phosphate is being reduced (so it’s low) and oxygen is being generated (so it is in abundance). Then as one goes deeper less photosynthesis is happening do less phosphate is being used up ( so it goes up in concentration) and more oxygen is being consumed in respiration (so it goes down)

Question 15

What is the name for the coastal features illustrated by the linear areas on the coast off North Carolina and Texas?

Answer 15

Barrier islands