| Grenvillian Mountain Building (~1000 Ma) |
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| Iapetan Rifting (~750-550 Ma) |
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| Passive Margin (~500 Ma) |
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| Appalachian
Mountain Building (Taconic Orogeny ~450 Ma) |
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| Appalachian Mountain Building (~450-300 Ma) |
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| Final Assembly of Pangea (~280 Ma) |
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| Atlantic Rifting 200 Ma |
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| Modern Passive Margin Present (Holocene) |
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| L E G E N D | ||||
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Continental Crust |  |
Carbonate Sediment | |
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Ocean Crust |  |
Accretionary Wedge Sediment | |
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Mantle |  |
Volcanic-Plutonic Arc | |
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Rift Sediment |  |
Clastic Sediment | |
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A Brief Tectonic History of Virginia (PDF) |
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