Term
List three mechanisms by which rivers transport sediment (mechanisms, not sand, mud, wood etc.) |
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Definition
a. SUSPENSION
b. BEDLOAD
c. DISSOLVED
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Term
Identify the coastal tectonic setting that has the fewest large river deltas. |
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Definition
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Term
Where does estuarine sediment ultimately come from?: |
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Definition
a) RIVERS c) BLUFFS
b) BIOLOGICAL d) SEA BED/OFFSHORE
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Term
List three processes by which the ocean erodes bedrock: |
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Definition
a. ABRASION
b. HYDRAULIC RIVING
c. DISSOLUTION
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Term
List three general options a homeowner on a rapidly eroding bluff has to save his or her house. |
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Definition
a. RETREAT/RELOCATE
b. ARMOR
c. ACCOMODATE
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Term
Identify the geological term used to describe the rapid downslope movement of large masses of material. |
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Definition
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Term
Three factors that influence the shape of a river delta are |
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Definition
1) TIDES
2) WAVES
3) RIVER
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Term
Differential erosion refers to |
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Definition
DIFFERENCE IN EROSION RATES BETWEEN ADJACENT ROCK TYPES
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Term
The upper delta begins where _______ begin to branch from the main stem of the river? |
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Definition
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Term
Identify three mechanisms by which deltas grow vertically (upbuild): |
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Definition
a. flooding
b. meandering
c. peat formation
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Term
List two ways that people increase bluff erosion rates on their property. |
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Definition
A. CLEARING VEGETATION
B. ATERINT LAWNS/SEPTIC
C. PATHS
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Term
List three wind-related factors which control the height of waves in the deep ocean:
Which of these most controls the height of waves in Maine’s estuaries? |
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Definition
1. wind speed
2. wind duration
3. wind fetch
4. wind fetch
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Term
List four sources (places) beach sand could come from? |
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Definition
1. People
2. offshore
3. biological
4. rivers bluffs
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Term
List three extreme conditions that beach plants must adapt to for survival |
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Definition
1. drought
2. lack nutrients
3. disturbance by waves, burial, storms
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Term
List three properties of dissapative beaches...what are the sorts of things that best characterize these beaches? |
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Definition
1. gentle slope
2. fine sand
3. wide, accreting, no cusps
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Term
What are three reasons our society provides protection for salt marsh habitats (what are three reasons we think marshes are of value to us)? |
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Definition
1. wildlife
2. filter contaminants
3. fish nurseries
4. storm barrier
5. export nutrients
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Term
List three reasons why tropical storms have historically caused relatively little damage to the Maine coast. |
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Definition
1. cold water in Gulf of Maine kills storm
2. Storms track parallel to coast
3. large tidal range
4. track faster
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Term
List 4 options homeowners have regarding rising sea level: |
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Definition
1. relocate
2. armor
3. accomodate
4. nothing
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Term
a) Draw a graph that illustrates sea-level change for the past 14,000 years in Maine, Hudson Bay and in Florida.
b) Label the vertical axis as elevation above and below modern sea level
c) Label the horizontal axis as time in thousands of years before present.
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Definition
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Term
Name the parts of the flood and ebb tidals labeled on the photo below. Land is toward the bottom of the photo, sea is toward the top.
1. Flood Ramp
2. Flood Channel
3. Ebb Split
4. Ebb spit
5. Ebb Shield
6. Spill over lobe
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Definition
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