The Changing Continents

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Presentation transcript:

The Changing Continents Chapter 10 - 3 The Changing Continents

Reshaping Earth Cratons – large areas of stable rock on continents Shields – rocks in cratons exposed to surface

Rifting – the breaking apart of continents

Terranes – pieces of lithosphere with a unique history Identified by: Fossils Major faults at boundaries Magnetic Properties

Accretion – process in which terrane becomes part of a continent Convergent boundaries Become mountains or surface areas

Sea mounts – small underwater terranes

Effects of Continental Change Mountain ranges Latitude location Climate Wind patterns Mountain ranges

Changes in Climate Sahara in Africa was covered by ice Located by south pole

Changes in Life Continents separate Populations separate New species form Madagscar

Supercontinents Supercontinent cycle – forming and breaking apart cycle

Pangea Appalachian Mountains formed Panthalassa – Ocean that surrounded pangea

Gondwanaland Laurasia

Modern Continents Rocky Mountains Andes Alps

The Future

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