Converging Boundaries and Landforms

Warm Up 9-6

1. What are the 3 types of plate boundaries?

2. What are the 3 types of convergent boundaries?

3. What is the zone of subduction?

4. If a continental plate and oceanic plate are converging, which will go under the other?

Converging Boundaries and Landforms

Continental – Continental Convergent Boundaries

When 2 continental plates collide, they create mountain ranges

This happens because the rock is less dense than ocean rock and is too light to be pulled under the lithosphere

Continental – Continental Convergent Boundaries

Example: India Plate converging with Eurasia Plate to create the Himalayas which include the tallest mountains, Mt. Everest and K2

The India plate is still moving Northward which is pushing the Himalayas 1 inch higher each year.

K2, 28,251’

Mt. Everest, 29,029’

Continental - Oceanic Convergent Boundaries

When a continental and oceanic plate collide, they create cascade volcanoes (volcanic mountain ranges)

The subducted (sunken) platemelts into magma.

The released water vapor and gases create pressure which pushesthe magma upward to form the volcano and cause eruptions

Continental - Oceanic Convergent Boundaries

Example: The Juan de Fuca Plate is converging with the North American Plate near Washington/Oregon which has created Mt. St. Helens and Mt. Adams

Mt. St. Helens

1980

Mt. Adams

Oceanic – Oceanic Convergent Boundaries

When 2 Oceanic Plates collide, they create trenches and volcanic island arcs

The trench will occur in the zone of subduction

The melting of a plate creates magma, and releases water vapor and gases which createspressure pushing the magma upward

Oceanic – Oceanic Convergent Boundaries

Example: Mariana Trench

Oceanic – Oceanic Convergent Boundaries

Example: Hawaiian Volcanic Island Arc

Continental Divide

1) Which type of boundary convergence formed them?

2) Look at the map to the left, what is weird about where these mountains are?

3) How do you explain this?

Your World Project

This will be a project that runs through multiple units

so you need to hang on to it!

You will receive a grade for each section of this project.

This is probably the largest project of the year so take it seriously!

Your World Project – Part Uno

• Start by drawing your own supercontinent (like Pangaea) and giving it a name

• Now label all of the landforms and assign them names (such as Ascavaris Ocean, Pintapu Peninsula, Gulf of Saberi, etc.)

• You can also add forests, deserts, lakes, rivers, etc… and name them.

• You must have at least 20 named landforms!

Your World Part 1 Rubric

10% - Have a non-basic shape for your supercontinent

20% - Have at least 20 named landforms

10% - Include at least 4 landforms that are on the supercontinent such as forests, mountain ranges, volcanoes, etc.

10% - Trace your supercontinent and landforms onto another piece of paper (do not transfer the names)

20% - Cut your supercontinent out, and then cut it into at least 3 continents

20% - Glue your smaller continents onto a blue piece of paper as they would have drifted apart

10% - Relabel landforms on new continents and color

Now Trace Your World onto a Second Page

Be sure to carry over your landforms (although you don’t need to rewrite all of the

names right now)