5/24 Calvin Midgett Pre-quiz
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- 1.
Identify the event shown in the image.- A.
Birth of an inlet
- B.
Nor'easter wind tide
- C.
Formation of a tidal delta
- D.
Spring tide
- 2.How deep/thick are Barrier Islands?
- A.
30 - 60 feet
- B.
10 - 20 feet
- C.
20 - 40 feet
- D.
40 - 70 feet
- 3.
What does this arrow identify?
- A.
Longshore current.
- B.
Tidal current.
- C.
Ebb tidal delta.
- D.
Flood tidal delta.
- E.
Littoral current.
- 4.What is littoral drift?
- A.
The movement of sand by the long shore current along the shoreline.
- B.
The tidal accumulation of sand parallel to the island.
- C.
The tidal flow of sand into the sound accumulating in a flood tidal delta.
- D.
The tidal movement of sand along the sound side of the island.
- 5.
Which of these layers of a core sample of a barrier island makes up the A layer which is the smallest amount of the core sample?
- A.
Marsh peat
- B.
Overwash sediments
- C.
Dune sand
- D.
Coastal plain/estuarine sediment
- 6.
What does this diagram show?
- A.
Barrier island migration.
- B.
Barrier island rollover.
- C.
Barrier island formation
- D.
Barrier island shoreface erosion.
- 7.What is a wind tide?
- A.
During a strong storm ocean winds push sound waters back and away from the sound floor up into low mainland coast areas such as marshes and rivers exposing the sound floor, oyster and grass beds and tidal sand bars.
- B.
During a strong storm ocean winds push ocean waters back and away from the sound floor up into high mainland coast areas such as marshes and rivers exposing the sound floor, oyster and grass beds and tidal sand bars.
- C.
During a thunderstorm ocean winds push ocean waters into the sound causing the sound sands to be pushed into the marshes and rivers.
- D.
During a rainstorm ocean winds push ocean waters through the island forming an inlet.
- 8.Why are the Outer Banks so far from the mainland coast of North Carolina?
- A.
With sea level rise, the mainland coastal plain moved back faster than the islands had rolled and migrated landward.
- B.
The Outer Banks are floating seaward due to migration.
- C.
The Outer Banks are returning to their original location further out on the continental shelf.
- D.
Sound waters in the basin behind the Outer Banks are filling with sand causing the islands to roll seaward.
- 9.The coastal plain of North Carolina slopes gently down into the sea at a shallow angle. A one foot vertical rise in sea level will move the beach anywhere from 100 to ____________ feet inland.
- A.
1,000
- B.
500
- C.
2,000
- D.
1,500
- 10.Why do layers of muddy marsh peat and even buried logs and tree stumps show up in core samples of an island's substrate?
- A.
The layers of peat and buried logs tell us that the sea level is rising and that the islands move or migrate inland as the sea level rises.
- B.
The layers of peat and buried logs tell us that the sound is shallow and the island is not very thick.
- C.
The layers of peat and buried logs tell us the geologists have drilled deep into a core sample.
- D.
The layers of peat and buried logs tell us the island is moving seaward away from the mainland peat and forest trees.
- 11.What is a long shore current?
- A.
A current formed by waves that break at an angle to the shore, then move in one direction, parallel to the shore for the length of the island.
- B.
The current that is formed when the Labrador and Virginia currents combine.
- C.
The current that is formed when the Labrador current and Gulf Stream collide near the outer banks and Cape Hatteras.
- D.
The current that is formed at an inlet where the ebb tidal delta and the flood tidal delta meet.
- 12.Which of these are Core Samples of a Barrier Island?
- A.
A. Dune Sand, B. Overwash sediment C. Marsh Peat D. Coastal plain and estuarine sediments
- B.
A. Dune Sand, B. Overwash sediment C. Marsh Peat D. Concrete
- C.
A. Dune Sand, B. Overwash sediment C. Loam D. Coastal plain and estuarine sediments
- D.
A. Dune Sand, B. Gravel C. Marsh Peat D. Coastal plain and estuarine sediments
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