'Subduction zones' diaporamas de présentation

Geological Hazards

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Theory of Plate Tectonics

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Subduction Zones of the World: Comparison to the Cascadia Subduction Zone and the Potential for Producing Large-scale Ea

Subduction Zones of the World: Comparison to the Cascadia Subduction Zone and the Potential for Producing Large-scale Earthquakes. By Alicia Thompson. Outline. Subduction Zone and Large-scale earthquake Tour of subduction zones South American New Zealand Sumatra Nankai

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Volcanoes

Volcanoes Processes that Form Magma in the Crust and Upper Mantle Increase in temperature Pressure-Release Melting: decrease in confining pressure lowers the melting point of rock Addition of water lowers the melting point of rock Fig. 8-2, p.171 Environments of Magma Formation

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Earthquakes and Volcanoes A Rocky Relationship

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WHAT IS OROGENY? Processes of mtn building

WHAT IS OROGENY? Processes of mtn building. Distinctive patterns of deposition eugeocline, miogeocline Deformation Folding and thrust-faulting Metamorphism Intrusions: batholiths, etc Volcanic Activity. TYPES OF MOUNTAINS. Volcanic: Shield and composite

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WHAT IS OROGENY? Processes of mtn building

WHAT IS OROGENY? Processes of mtn building. Distinctive patterns of deposition eugeocline, miogeocline Deformation Folding and thrust-faulting Metamorphism Intrusions: batholiths, etc Volcanic Activity. TYPES OF MOUNTAINS. Volcanic: Shield and composite

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Volcanoes and Plate Tectonics

Volcanoes and Plate Tectonics. Chapter 7. Basic Earth Science Truth. HEAT = ENERGY DENSITY = MASS/VOLUME Adding HEAT to a substance causes atoms to move faster, with more energy This causes its volume to expand If VOLUME increases while MASS remains constant, DENSITY will _______________.

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Volcanoes

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TSUNAMI DESCRIPTION

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WHEN THINGS COME UNSTUCK

WHEN THINGS COME UNSTUCK. Plate Tectonics. Plate tectonics: The main features are: . The Earth's surface is made up of a series of large plates (like pieces of a giant jigsaw puzzle). These plates are in constant motion travelling at a few centimetres per year.

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Week 13

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Ch. 7 Volcanoes

Ch. 7 Volcanoes . Ch. 7.1 Volcanoes and Plate Tectonics. Most rock in the very hot mantle / asthenosphere remains solid due to very high pressure. Sometimes conditions (lower pressure or added water) allow part of the solid mantle to melt and become flowing liquid magma. Volcanism.

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PLATE TECTONICS

PLATE TECTONICS. By Alice . What are Tectonic plates?. . The Earth's surface is made up of a series of large plates (like pieces of a giant jigsaw puzzle). .These plates are in constant motion travelling at a few centimetres per year.

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Plate Boundary Volcanism

Volcanoes are associated with two of the three types of plate boundaries, these being convergent and divergent boundaries. Very little volcanic activity is seen at transform fault boundaries. Volcanism associated with plate tectonic activity are found in three areas on Earth;.

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How Continental Drift arranged the continents to how we know them today

How Continental Drift arranged the continents to how we know them today. Unit 4. Theory of Continental Drift. In 1912 Alfred Wegener proposed that a large super continent called Pangea split into smaller pieces about 200-300 million years ago.

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VISCOSITY

VISCOSITY. The resistance of material to flow the higher the viscosity, the less easily something (magma/lava) can flow Motor oil: Flagstaff vs. Phoenix hotter temps = lower viscosity oil lower temps = higher viscosity oil. Cinder cones/maars. Basalt Short lived (<10 years?)

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Seafloor Spreading

Seafloor Spreading. The plates pull apart and new crust is formed when magma goes to the surface and cools. Seafloor spreading shows evidence of polarity reversing. The older parts of crust are pushed into subduction zones causing earthquakes and mountains to push up.

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Review Guide For Exam 2

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The causes of a tsunami

The causes of a tsunami. Lo: to be able to explain what causes a tsunami. http://whs.moodledo.co.uk/file.php/1365/EarthSystems/Earth%20Systems/Subduction.swf. From memory sketch and label your own diagram of a destructive plate boundary. 2 types of plate Subduction zones

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