'Laurentia' diaporamas de présentation

Chapter 9

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The Length of the Proterozoic

The Length of the Proterozoic. the Proterozoic Eon alone, at 1.955 billion years long, accounts for 42.5% of all geologic time yet we review this long episode of Earth and life history in a single section . The Phanerozoic. Yet the Phanerozoic, consisting of Paleozoic, Mesozoic,

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Alleghany Orogeny

Alleghany Orogeny. Birth of Pangea. Alleghany Orogeny. Final event in the assembly of Pangea Iapetus Ocean is completely closed Gondwana collides with Laurentia Western Africa collides with Eastern North America Largest orogenic event in southern Appalachians.

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Jesse Davenport

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Lower Palaeozoic history of UK 1. Continental motions 2. Cambrian events 3. Ordovician events - The Grampian Oro

Lower Palaeozoic history of UK 1. Continental motions 2. Cambrian events 3. Ordovician events - The Grampian Orogeny 4. Ordovician and Silurian - The history of the Iapetus Ocean 5. Silurian - Iapetus closure 6. Devonian - Acadian Orogeny Development of major

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