100+ Archaean PowerPoint (PPT) Presentations, Archaean PPTs

Archaean - PowerPoint PPT Presentation

Archaean magmatism

Archaean magmatism. NB- Arch ea n (US spelling) or Arch aea n (UK spelling). Why?. Somehow different from modern magmas Interesting to test our understanding of petrogenetic processes Not that rare, and good South African examples (Barberton) Economic interest

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966 views • 74 slides

Precambrian Era

Precambrian Era . By Erich Hartman. When It Occurred. The Precambrian Era occurred from 4.6 billion years ago to 544 million years ago. It was the first of four eras on the geological time scale. The Precambrian Supereon.

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529 views • 13 slides

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Archaean - PowerPoint PPT Presentation

Archaean magmatism

Precambrian Era