Quiz 3 take home exercises (10pts)
Name:_________________________________
Each question is worth 0.5pts
WSU ID:_________________________________
WORKSHEET 13 Unsafe Ground: Landslides and Other Mass Movements
La Conchita Mudslide, CA
2. When you double-click on placemark Problem 2a, you will be looking ENE at the steep, seaward-sloping face
of a terrace. The placemark is positioned on the most recent, active mudslide, which is the infamous La
Conchita mudslide.
(a) Why do you think this mudslide occurred?
A) the area has little vegetation to hold the soil
B) the area could have been undercut by the road half-way up the slope
C) the sea terrace on which the houses sit has over-steepened the cliff
D) all of the above
(b) What do the areas marked by placemarks Problem 2b represent?
A) construction sites
B) older mudslides
C) former tsunami erosional features
(c) Do you want to buy a house near placemark Problem 2c?
A) yes, it will likely be cheap, and no problems will happen in my lifetime
B) no, it is likely to experience another mudflow collapse
C) yes, it will likely be cheap, and I can make a quick profit
Vaiont Dam
4. Check and double-click on placemark Problem 4 to fly you to the site of the Vaiont Dam disaster in 1963.
(a) Which answer correctly identifies the features highlighted by placemarks Problem 4a-i, -ii, and -iii?
A) 4a-i: dam; 4a-ii: hummocky debris apron; and 4a-iii: slide scar
B) 4a-i: hummocky debris apron; 4a-ii: slide scar; and 4a-iii: dam
C) 4a-i: slide scar; 4a-ii: dam; and 4a-iii: hummocky debris apron
(b) What caused the landslide to occur?
A) the layers dip towards the valley
B) the reservoir formed by the dam lubricated the slip surface
C) both of the above answers are correct
D) none of the above answers are correct
WORKSHEET 14 Running Water: The Geology of Streams and Floods
Stream Patterns
2. Streams can develop a variety of patterns depending on the rock type and structure that underlies them.
(a) What is the stream pattern exhibited at placemark Problem 2a?
A) trellis
B) parallel
C) rectangular
D) radial
E) dendritic
(b) Check and double-click the folder Problem 2b. What is the overall general stream pattern exhibited at this location
with tributaries flowing in to the main trunk stream?
A) trellis
B) parallel
C) rectangular
D) radial
E) dendritic
Meandering Stream Features
3. Meandering streams develop various landforms along the stream bed and its floodplain.
(f) What has happened to the meandering stream shown by placemark Problem 3f?
A) it has become incised/entrenched because of a change in base level
B) it has carved a deep stream valley because of the soft rock in the area
C) it has carved a steep canyon because it experienced a catastrophic flood
D) it is a normal meandering stream that has just experienced a lot of mass wasting
(g) Check and double-click placemark Problem 3g. This meander has been cutoff sometime in the past and now has
been by-passed by the Green River. Did the cutoff happen before or after the river incised into the landscape?
A) after, because the bend has been incised as well
B) before, the river could not have cut through the meander neck if it was already entrenched
WORKSHEET 15 Restless Realm: Oceans and Coasts
Sea-Floor Bathymetry
1. As you have seen in previous chapters, the sea-floor is not flat and featureless, but rather has numerous
interesting landforms that reveal much about geologic processes active on our planet.
(a) Check and double-click the placemarks for Problems 1a-i, -ii, and -iii to fly to the southern tip of South America.
Identify the bathymetric feature associated with each placemark.
A) 1a-i: continental shelf; 1a-ii: continental slope; and 1a-iii: abyssal plain
B) 1a-i: continental slope; 1a-ii: continental shelf; and 1a-iii: abyssal plain
C) 1a-i: abyssal plain; 1a-ii: continental slope; and 1a-iii: continental shelf
D) 1a-i: abyssal plain; 1a-ii: continental shelf; and 1a-iii: continental slope
(c) Check and double-click the placemarks for Problem 1c-i and 1c-ii. Which placemark shows bathymetry associated
with an active margin and a passive margin?
A) 1c-i: active margin and 1-ii: passive margin
B) 1c-i: passive margin and 1-ii: active margin
Barrier Islands & Spits
3. Barrier islands, beaches, and spits form in areas with abundant sand.
(c) What is the feature highlighted by placemark Problem 3c?
A) spit
B) tidal flat
C) tidal bar
D) tidal channel
(d) Check and double-click the placemarks for Problem 3d to fly to Cape Cod, MA. Here, the remains of an E-W
oriented glacial moraine is being reshaped into a spit by a longshore current. What is the general direction of the
current?
A) from E to W
B) from W to E
C) from N to S
D) from S to N
(e) Piers or groins have been built out into Lake Michigan in Chicago to prevent sand erosion (placemark Problem 3e).
Which direction is the current that is moving the sand?
A) from E to W
B) from W to E
C) from N to S
D) from S to N
Coastlines & Sea-Level Rise
4. Turn on the “U.S. East Coast Sea Level Changes” overlay (make it semi-transparent) and double-click the
placemarks for Problems 4a-i, -ii, -iii, and -iv in the Problem 4 folder.
(a) If the Greenland and Antarctica ice sheets melt, where would you want to own land?
A) Problem 4a-i
B) Problem 4a-ii
C) Problem 4a-iii
D) Problem 4a-iv
WORKSHEET 16 A Hidden Reserve: Groundwater
Surface and Groundwater flow
2. Surface water flow is influenced most directly by elevation differences. Groundwater flow is controlled by
elevation differences in the water table, which commonly reflects surface elevations to a degree.
(a) Use the Hand Tool to determine the elevations at the placemarks for Problems 2a-i and 2a-ii.
What direction should the surface and groundwater flow? (Confirm this by turning on the
“Everglades, FL-Previous Groundwater Flow” overlay).
A) N to S
B) S to N
C) E to W
(b) Turn on the “Everglades, FL-Present Groundwater Flow” overlay. What has changed?
A) part of the swamps have been drained
B) canals have diverted water resources to coastal cities
C) groundwater flow directions have been changed by the canal system
D) all three of the above answers are correct
E) there has been little change to the water resources in this area
(c) What is causing the dramatic saltwater incursion as seen on the “Everglades, FL-Present Groundwater Flow”
overlay?
A) salt water is much denser
B) various urbanization changes affecting the slope of the water table
C) sea level fall
D) coral reefs protecting the coast from salt water have been dying off
Karst Features
4. Acidic groundwater can dissolve soluble rocks to form fascinating karst landscapes
(b) Check and double-click placemark Problem 4b to fly to an area near Orleans, IN. The placemark points to the Lost
River, a stream that flows from east to west in this area. Follow the stream to the west. What kind of stream is it?
A) intermittent
B) disappearing
C) arroyo
D) perennial
(e) What kind of karst feature is shown by placemark Problem 4e (see photo in the placemark)?
A) cave
B) monadnock
C) dry valley
D) sinkhole
Answer Sheet
Name:________________________________
Quiz 3 take home exercises (10pts)
Each question is worth 0.5pts
WSU ID:_________________________________
WORKSHEET 13 Unsafe Ground: Landslides and Other Mass Movements
2a) ____
2b) ____
2c) ____
4a) ____
4b) ____
WORKSHEET 14 Running Water: The Geology of Streams and Floods
2a) ____
2b) ____
3f) ____
3g) ____
WORKSHEET 15 Restless Realm: Oceans and Coasts
1a) ____
1c) ____
3c) ____
3d) ____
3e) ____
4a) ____
WORKSHEET 16 A Hidden Reserve: Groundwater
2a) ____
2b) ____
2c) ____
4b) ____
4e) ____