Open Questions: Geologic History of the Earth

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Introduction

Volcanism

Meteroite impacts


Recommended references: Web sites

Recommended references: Magazine/journal articles

Recommended references: Books

Introduction

Volcanism

Meteorite impacts



Recommended references: Web sites

PhysicalGeography.net
"An educational web portal that focuses on" physical geography. The site includes an online textbook, glossary, and external links.
The Physical Environment: An Introduction to Physical Geography
Online textbook of physical geography, by Michael Ritter. There is also a blog maintained by the author.
West Australian find sets back Earth clock
January 2001 news article about discovery of 4.4 billion year-old minerals that indicate Earth may have cool enough to allow life to develop earlier than previously supposed.
Record of Earth's history found in ancient rocks
August 2000 news article about evidence from sulphur isotopes that atmospheric oxygen levels rose significantly between 2.5 and 2.1 billion years ago.


Recommended references: Magazine/journal articles

The iron record of Earth's oxygen
Sid Perkins
Science News, June 20, 2009
Scientists are decoding the geological secrets of banded iron formations.


Recommended references: Books


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