Permian – 225 Million Years ago Triassic – 200 Million Years ago.

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Presentation transcript:

Permian – 225 Million Years ago

Triassic – 200 Million Years ago

Jurassic – 135 Million Years ago

Cretaceous – 65 Million Years ago

Present Day

Provides evidence that poles have flipped overtime

Three types of plate boundary

Convergent Boundaries

Continent-Continent Collision

Continent-Oceanic Crust Collision

Subduction

Ocean-Ocean Plate Collision

Divergent Boundaries

Divergent Boundary

Transform Boundaries Above: View of the San Andreas transform fault

Volcanoes and Plate Tectonics…

Volcanism is mostly focused at plate margins Pacific Ring of Fire

Volcanoes are formed by:

 Separation at a divergent boundary that is filled in with magma.

What are Hotspot Volcanoes? The Hawaiian island chain are examples of hotspot volcanoes.

The tectonic plate moves over a fixed hotspot forming a chain of volcanoes. The volcanoes get younger from one end to the other.

Earthquakes and Plate Tectonics…

EARTHQUAKE WAVES Seismographs record earthquake waves Seismograms show: Amplitude of seismic waves (how much rock moves or vibrates)Amplitude of seismic waves (how much rock moves or vibrates) Distance to the epicenterDistance to the epicenter Earthquake directionEarthquake direction

EARTHQUAKE MAGNITUDE measures the size of seismic waves  the energy released by the earthquake measures the size of seismic waves  the energy released by the earthquake Richter scale=measurement of energy released based upon wave amplitude (size of vibration) What you need: Amplitude (size of vibration = wave height)Amplitude (size of vibration = wave height) Time between arrival of 1 st P and 1 st S wavesTime between arrival of 1 st P and 1 st S waves

P & S (body waves) move through earth & arrive first P & S waves used to calculate magnitude of earthquake Amplitude = height of wave (how much the rock moves; size of vibration)

MERCALLI VS. RICHTER