Natural Disasters Topic 3 (Plate Tectonics)
Plate tectonics
Hazards Revision Slides
Litoshpere..Crust & Rigid upper mantle Astenosphere – weak and capable of flow Oceanic and Continental crust Oceanic – 6-12 km thick, dense heavy, basalt,
SIMA / SIAL??? SIMA – Silicon and Magnesium SIAL – Silicon and Aluminium.
Plate Tectonics: It started with 4 important observations: 1. Continental Fit: South America and Africa in particular seemed to “fit together”.
1 Plate Tectonics Plate Tectonics Chapter 22.4. 2 The Solid Earth The Solid Earth Crust (very thin: 3-30 miles (5-50 km) thin) Mantle (mobile) Core (HOT!!!)
Continental Drift
BAESI Plate Tectonics Ellen Metzger Director, Bay Area Earth Science Institue SJSU Geology and Science Education Program With thanks to Jon Hendricks,
Plate Tectonics. What is Plate Tectonics The Earth is broken into large Plates. The size and position of Plates change. Plate edges colliding - geologic.
SIMA / SIAL???
Plate Tectonics
