This PowerPoint presentation is intended to share knowledge in processes occur along the plate boundaries.

1. Processes occur
along Plate
Boundaries
Mr. ROWEL V. ENGRESO
G10- SCIENCE TEACHER

2. Learning Objectives:
1. Identify the different types of plate boundaries
2. Explain the different processes occurs along types of plate
boundaries.
3. Distinguish the different geologic formation and events
happening along types of plate boundaries.
4. Name important features along plate boundaries.

3. Recall
Triangulation Method
Steps and Processes
1. Evaluate the data from three different
seismological recording stations. (Analyze)
2. Determine the difference in the arrival time
of P-wave and S-wave recorded from each
recording stations
3. Determine the distance of the epicenter
from the station
4. Use the triangulation method to locate the
center.

4. Recall
Outside the country
The travel of P-wave and S-
wave already covers
kilometers of distance in
time difference of minutes.
Since the Primary Wave
moves faster than the
Secondary wave, it reaches
first the detector which is the
seismograph that is based
on every recording stations.

5. Pacific Ring of Fire

6. Active Volcanoes in the Philippines
• The Philippines is blessed with
so many majestic and active
volcanoes. Some are inactive and
some are dormant. From Luzon,
Visayas and Mindanao, many
volcanoes within the country
have recorded several cases of
volcanic activity, releases fumes
and poisonous gas and the
deadly flowing of magma turned
lava from the crater of this land
formations.

7. Active Volcanoes in the world

8. Plate Tectonics
The Earth is divided into
several major and minor
plates.
Plates are rigid sections of
the lithosphere that move
as a unit. The earth’s
lithosphere comprises the
crusts and the upper
portion of the mantle.
Based on the geologic

9. Plate Boundaries
How will you describe
each plate boundaries?
Divergent plate boundary
– there is moving away or
moving apart of two
plates at opposite
directions.
Convergent plate

10. Convergence between plates and crusts
•Oceanic – oceanic
convergence
•Oceanic – continental
convergence
•Two continental

11. Oceanic-Continental Convergence
• In this kind of convergence,
there is an overriding of
oceanic crust under the
continental crust causing to
thrust on the earth’s interior,
we call this process as
subduction. As the subduction
rate continues, it form deeper
portion under the body of
water which now known as

12. Oceanic-Continental Convergence

13. Oceanic-Continental Convergence

14. Oceanic-Continental Convergence
This happen due to difference on thickness and
densities of the two crusts, the continental crust is
thicker but less dense causing rise on top of the
oceanic crust which is thinner but denser. The
chemical composition also affects the subduction
process. The continental is made up of granite, while
oceanic crust is made up of basalt that is denser
than granite.

15. Oceanic- Oceanic Convergence
In this kind of convergence, two
oceanic crusts, meet and create
deeper portion resulting to deeper
trench which extends up to 80 km
deep. Parallel to this trench are
series of volcanoes line known as
island arc with a concentration of
reservoir of melted magma,
waiting to rise, as soon as the
fault along plates boundary move.

16. Oceanic- Oceanic Convergence
Another result of this
kind of convergence is
the sudden flick of
oceanic floor due to
movement of plates
causing to produce high
seismic energy and
eventually develop huge
wage known as tsunami.

17. Hotspot
Hotspot is the concentration of
molten rocks where series of
island volcanoes are located and
their age can be determined
through plate movement,. The
farther the location of the island
volcano through time, the older
is the volcano. It means island
volcano on top of plume where
active hotspot is located is
considered as the youngest
among them.

18. Continental crusts converge
•In this kind of
convergence, no
depression occur so
there is no trench that
will likely develop,
since continental crust
is thick, it tends to form
an upward depression,

19. Continental crusts converge

20. Continental crusts converge

21. Oceanic – Oceanic Divergence

22. Divergent Plate Boundary
• A divergence occur at the middle of the ocean, separating
of two oceanic crusts due to high pressure from the earth’s
interior. The action of the asthenosphere and the rising
magma, allows the plates to move sideways, dragging the
crusts leaving a space in between. As years went by, the
space is filled with cooled magma rise and stuck to form
huge towers of column known as oceanic ridges.

23. Divergent Plate Boundary

24. Continental crusts divergence
When two landforms move and separate due to high
pressure, results to wider space, creating enough
habitat for wildlife. The space in between is now called
rift valleys.

25. Transform Fault Plate Boundary
• In this plate boundary, two plates move side by side
causing to develop tension and tremors that eventually
lead to earthquake

26. Transform Fault Plate Boundary
• In this plate boundary, two plates move side by side
causing to develop tension and tremors that eventually
lead to earthquake

27. Transform Fault
Plate Boundary