Booklet (PDF format) on the Pleistocene glaciations known as the Great Ice Age and the resulting geomorphological, climatic, and environmental changes that occurred on Earth during the period.
Site with a series of articles showing how chemists and geologists use analytical chemistry to determine the age of the Earth, determine Earth's history, predict volcanic eruptions, observe long-term atmospheric change and study pollution.
U.S. Department of the Interior |
U.S. Geological Survey