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Slide 1

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Portuguese Bend
An example of a Landslide…read more

Slide 2

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What is the Portuguese Bend?
The Portuguese Landslide is perhaps one of
the largest and most famous landslides in
California, covering about 260 acres. It is
visited by several of the CSULB geology
classes as an example of mass wasting.
Mass wasting is the movement of rock
material down slope due to Earth's gravity.…read more

Slide 3

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Where and when?
The Portuguese Bend has been taking place
sporadically for the past 250,000 years but
we only discovered this after a major
movement on August 17th 1956.
The Portuguese Bend is located within
California in the United states and spans
260 acres with an average thickness of
135ft.…read more

Slide 4

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The Portuguese Bend has left its mark on this hill in San
Francisco and Can be seen clearly on this picture.…read more

Slide 5

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The main mechanism associated to the
landslide at the Portuguese Bend is the
housing development constructed in the
1950's. This is because of the installation
of swimming pools and underground
septic tanks which have created and
increased ground water level and thus
reduced friction between grains in the rock
and thus causing a further landslide.…read more

Slide 6

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Main Factors or Triggers
· One of the main
causes for the
landslide is dodgy
housing and pools,
built by dodgy
people ... IN THE
DODGY 50'S!!!…read more

Slide 7

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Slide 8

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