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Chapter 10: Section 1 Continental Drift
Chapter 10: Section 1 Continental Drift

... are older than 540 million years. Rocks within the cratons that have been exposed at Earth’s surface are called shields. • One way that continents change shape is by breaking apart. Rifting is the process by which a continent breaks apart. • terrane a piece of lithosphere that has a unique geologic ...
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File
File

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... What happens to hot material and cold material when in the same container? What is the form of heat transfer in Earth's mantle which causes tectonic plates to move? What is the canyon-like feature which forms at a subduction zone? What is the country which is sometimes referred to as a sub-continent ...
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Convection in the Mantle (5-2)
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... Inner core Outer core Mantle Crust Subduction boundary/zone Divergent boundary Convergent boundary Transform boundary Mid-ocean ridge Pangaea Lithosphere Tectonic plates B. Know the directions in which the different boundaries move (Remember: “definition disco” divergent…convergent…transform…subduct ...
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Supercontinent



In geology, a supercontinent is the assembly of most or all of the Earth's continental blocks or cratons to form a single large landmass. However, the definition of a supercontinent can be ambiguous. Many tectonicists such as P.F. Hoffman (1999) use the term ""supercontinent"" to mean ""a clustering of nearly all continents"". This definition leaves room for interpretation when labeling a continental body and is easier to apply to Precambrian times. Using the first definition provided here, Gondwana (aka Gondwanaland) is not considered a supercontinent, because the landmasses of Baltica, Laurentia and Siberia also existed at the same time but physically separate from each other. The landmass of Pangaea is the collective name describing all of these continental masses when they were in a close proximity to one another. This would classify Pangaea as a supercontinent. According to the definition by Rogers and Santosh (2004), a supercontinent does not exist today. Supercontinents have assembled and dispersed multiple times in the geologic past (see table). The positions of continents have been accurately determined back to the early Jurassic. However, beyond 200 Ma, continental positions are much less certain.
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