6731198
Descrição
Mapa Mental por Evie Davis, atualizado more than 1 year ago
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Criado por Evie Davis
mais de 7 anos atrás
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Plate Tectonics
- Structure of the Earth
- Core - Iron, Nickle, semi-molten outer core, 6,000C
- Mantle - iron, magnesium, semi-molten, 5,000C
- Asthenosphere - molten, convection currents occur
- Crust - coolest, less dense rocks
- Oceanic - basaltic, 6-10km thick
- Continental - can be up to 70km, made from various rocks
- Continental - can be up to 70km, made from various rocks
- Oceanic - basaltic, 6-10km thick
- Lithosphere - contains the rigid part of the mantle and the crust, 80-80km
- Core - Iron, Nickle, semi-molten outer core, 6,000C
- Pangaea
- Alfred Wegener published an idea that a supercontinent called Pangaea lived 300 million years ago
- Split into two continents - Laurasia in the south and Gondwanaland in the north.
- Evidence
- Geological - the fitting of south America and Africa, evidence of glaciation in India, Antarctica and south America., rock sequences in Scotland and Canada.
- Biological - fossil remains of Mesosaurus found in both southern America and southern Africa., plant remains in India and Antarctica
- Geological - the fitting of south America and Africa, evidence of glaciation in India, Antarctica and south America., rock sequences in Scotland and Canada.
- Palaeomagneticism - lava erupts from the Mid Atlantic Ridge, minerals in the lava are aligned with the Earth's magnetic pull. Sea floor spreading; older bands of rock are further away from the ridge.. The subduction zones equal out this increase in landmass.
- Alfred Wegener published an idea that a supercontinent called Pangaea lived 300 million years ago
- Types of plate margins
- Destructive
- Subduction Zone
- Less dense plate, subducts
- Oceanic<Continental
- Oceanic<Continental
- Earthquakes and volcanoes
- Subduction Zone
- Constructive
- Two plates pulling apart
- Lava rises from the ridge and creates new land
- Two plates pulling apart
- Conservative
- Two plates slide past each other
- Friction is created, release causes earthquakes
- San Andreas Fault line
- Two plates slide past each other
- Destructive
- Tectonic Plate Landforms
- Constructive
- Oceanic Ridge - where two plates pull apart there is a weaker zone in the crust and an increase in heat near the surface. the hotter expanded crust forms a ridge.
- Iceland - Mid Atlantic Ridge
- Iceland - Mid Atlantic Ridge
- Rift Valley - the land mass fractures due to heat and rifts appart, central parts of land drop and form rift valleys.
- Oceanic Ridge - where two plates pull apart there is a weaker zone in the crust and an increase in heat near the surface. the hotter expanded crust forms a ridge.
- Destructive
- Fold mountains - during subduction, one plate is melted and increased pressure then leads to volcanoes forming. Once the chamber is empty. The volcano becomes inactive and thus becomes a mountain.
- Island Arcs - a string of volcanic islands in the ocean along the plate boudary.
- Fold mountains - during subduction, one plate is melted and increased pressure then leads to volcanoes forming. Once the chamber is empty. The volcano becomes inactive and thus becomes a mountain.
- Constructive
Anexos de mídia
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