Lab 3 - Plate Tectonics-2-23
pdf
keyboard_arrow_up
School
CUNY College of Staten Island *
*We aren’t endorsed by this school
Course
101
Subject
Geography
Date
Dec 6, 2023
Type
Pages
6
Uploaded by ProfessorMetalEchidna20
1
Name: --------------------------------------
Date: --------------
Lab 3 Plate Tectonics
Required materials
Pencil
Colored pencils
Computer with Google Earth software loaded
In-class lab exercises
Part 1 Plate processes
The diagram below is a simplified representation of an ocean-ocean divergent margin.
1.
Label the oceanic lithosphere, the asthenosphere and the zone of melting, and the
mid-ocean ridge.
2.
Draw arrows on the plates to indicate the directions in which they are moving.
3.
Draw a second set of arrows to show the direction of flow in the asthenosphere.
4.
What feature would you find at the center of the mid-ocean ridge?
2
The diagram below is a simplified representation of an ocean-continent convergent margin.
1.
Label the oceanic lithosphere, the asthenosphere and the zone of melting. Indicate
the regions where earthquakes may occur.
2.
Draw arrows on the plates to indicate the directions in which they are moving.
3.
Draw a second set of arrows to show the direction of flow in the asthenosphere.
4.
Draw and label the locations of the trench and the accretionary wedge.
3
The diagram below is a simplified representation of a hot spot.
1.
Draw arrows on the plate to indicate the direction of movement.
2.
Label which island is the oldest and which is the youngest.
3.
What information do hotspots like this give us about past plate movements?
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
4
Part 2 Calculation of Plate movement
Look at the map of the age of the seafloor in figure 2.17 of
“Earth
Science”.
1.
From your initial observation, do you think the Mid-Atlantic Ridge is spreading faster or
slower than the East Pacific Rise?
Explain your reasons.
Looking at the North Atlantic coast
2.
What age is the seafloor immediately off the coast of NYC?
3.
Using the ruler tool in Google Earth
, what is the shortest distance (in km) of the edge
of the continental shelf off NYC to the Mid-Atlantic Ridge?
4.
Using the equation Speed = distance / time, how fast had North America moved away
fromthe Mid-Atlantic Ridge (in cm/year)?
Looking at the East Pacific coast
South America is moving away from the East Pacific Rise at approximately 8.6 cm/year.
5.
Do these rates agree with your initial calculations? Explain why.
5
Part 3 Worldwide Plate Boundaries
On the present-day world map on the next page use different colors to mark the
divergent, convergent and transform plate boundaries.
Choose a different color for each
type of plate boundary, and show these colors in a key.
1.
Are there more convergent or divergent boundaries, or are their total lengths about
the same? Explain the reasons.
2.
Where are most of the transform boundaries located? Why?
6
Instruction for coloring different plate boundaries
Divergent margins and spreading centers (draw in black)
Convergent margins - subduction zone (draw in blue)
Transform faults
–
strike-slip faults (draw in green)
Hot Spot (draw in red)
1.
What kind of plate boundary exists at the San Andreas Fault?
2.
What kind of plate boundary exists at the Southeast Indian Ridge?
3. How are the African Plate and the South American Plate moving relative to each
other?
4.
How are the plates moving relative to each other at the Mid-Ocean Ridge?
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help