EARTH SCIENCE
MOVEMENTS OF PLATE
Folding and Faulting, Plate Boundaries and Plate Movement
Prepared by: Mr. Ryan Tiozon
LEARNING OBJECTIVES
1. Explain the different theories about the
movement of Earth’s Crust.
2. Interpret how the movement of plates lead to the
formation of folds and faults.
INTRODUCTION
01
Earth’s surface is composed of tectonic plates that
are constantly moving.
02
Tectonic plates experience different types of forces;
● Tension and compression
TENSION
Occurs when the plates are pulled apart causing
either an ELONGATION or a BREAKAGE in the crust.
●
Volcanic islands, mid-oceanic ridges are formed.
COMPRESSION
Occurs when the plates are pushed toward causing
them to crash.
●
Mountains, earthquake formed or occurred due to
compression.
FOLDING
Occurs when the Earth’s crust bends away from a
flat surface.
●
●
Anticline- upward bend
sYncline- downward bend
FAULTING
Occurs when the Earth’s crust completely breaks
and slides past each other.
●
Causes earthquakes to occur.
01
PLATE BOUNDARIES
Convergent, Divergent and Transform
Fault
CONVERGENT
Two plates moves toward each other;
● Oceanic-oceanic
● Oceanic-continental
Subduction- denser sinks over the
other
Formation of trenches and volcanoes.
DIVERGENT
Two plates moves away to each
other; magma rises forming new
landl
● Older Rocks are pushed aside
● Formation ridges.
TRANSFORM
When plates move slide past each
other; two plates move and slide in
opposite direction.
● Formation of faults.
CONTINENTAL DRIFT THEORY
is the hypothesis that the Earth's continents have moved over geologic time relative to each
other, thus appearing to have "drifted" across the ocean bed.
Geographical
Continental coastlines
Biological
Fossils found in different continents
Climatic Evidence
Glacial period occurred in areas.
ONE
TWO
THREE
Continents rest on massive
slabs of rock called
TECTONIC PLATES.
Tectonic plates are always
moving due to motion of the
region in the upper mantle
called ASTHENOSPHERE.
Some of the most dynamic
sites of tectonic activity are
SEAFLOOR SPREADING
ZONES and GIANT RIFT
VALLEYS.
THANK
YOU!
Evaporation
Percolation