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School
University Of Arizona *
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Course
212
Subject
Geography
Date
Dec 6, 2023
Type
Pages
3
Uploaded by MinisterLightningDog30
1. (3 pts) Use the Large World Map and the other maps to answer the
following questions. Recall that age is expressed in millions of years
My)
a)What are the approximate latitude and longitude of Hawaii (the big
island)? (To the nearest degree, and remember that latitudes are
either °N or °S, and longitudes are either
°E or °W.)
_____________(latitude) and _______________ (longitude). On your
page-size map, please put a big A on the big island of Hawaii.
b)What is the age of the oldest oceanic crust along the coast of India?
_________My.
On your page-size map ,put a large B in the Bay of Bengal.
c)What is the youngest crust in the Labrador Sea ? __________ My.
On your page - size map , put a big C showing the location of the
youngest crust in the Labrador Sea.
Is the Labrador Sea still growing? (Yes or No) ____________
d)On your page-size map, put a big D where the Mid - Ocean Ridge
rises above sea level .
e) On your page-size map, put a big E on the approximate location of
the fastest spreading center.
f)The Challenger Deep in the Mariana Trench is the deepest point in
the world ocean (it is labeled on the World Map–near the Philippines).
How deep is it? _______________(check your units)
Put a big F von your page- size map showing the approximate location
of Challenger Deep. What plate tectonic process is occurring at the
Mariana Trench? _________________
2.(3 pts)Please indicate the locations of spreading centers (mid-ocean
ridges) and subduction zones (trenches) on the page-size map. Use
solid lines (or blue lines) for subduction and dashed lines (or red lines)
for spreading centers.
These features delineate the major tectonic plates:please label the ten
major plates on Earth (African, Antarctic, Cocos, Eurasian, Indo-
Australian, Nazca, North American, Pacific, Philippine and South
American)–yes, just copy the name of each plate from the Plate Map
on to your page - size map.
3. (2 pts) Determine how fast the Nazca Plate is moving between the"
triple junction” at the intersection of the Nazca, Pacific and Antarctic
Plates, and the subduction at the Peru-
Chile Trench. --Remember that cm = centimeters, km = kilometers,
My= millions of years, yr = years– Remember that a RATE (speed) is
equal to the DISTANCE divided by the TIME– To convert km/My to
cm/yr, just divide by 10
Step #1:First, find the triple junction on your world map (it's south of
Easter Island, where the East=Pacific Rise crosses the Chile Fracture
Zone). Now measure the distance from there to the crook of South
America where the oldest ocean crust is in cm on your Large World
Map (not the papermap!): Distance on map in cm =__________ ( see
D2L if you don’t have a map)
Step #2:Convert the map distance to the real distance by multiplying
by the map scale (358km/cm) Distance on Earth in kilometers (km) =
__________ km
Step #3:The age of the oldest crust along the coast of Chile where you
measured is the time. Time = Age of the oldest crust in millions of
years = __________My
Step #4:Calculate The rate of plate motion (Rate = Distance / Time) in
both km/my and cm/year (divide step #2 by step #3). (Remember that
1 km/My = 10 x cm/yr or 1 cm/yr = 0.1 x km/My) Show your work. SEA
LEVEL
4. (2 pts) The observed sea level rise today is ~3 mm/yr. List two
reasons that sea level is rising today.
1.
________________________________________________________
________________
2.
________________________________________________________
________________
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