This site features maps of the paleogeography of the Southwestern US from 1.8 billion years ago to 10 million years ago. The images were prepared by placing stratigraphic, tectonic, and sedimentologic data on a base map, plotting land versus sea over this data, and then adding climatic data and detailed landforms such as mountains, shelf edges, rivers, arc-trench systems, and lowlands. The maps are ... Full description.

This site consists of a series of modules for introductory geology. The site features useful, interactive animations for a large range of geology topics. There are lecture slide shows, quizzes, and interactive computer activities. Content is divided into lecture material and laboratory activities, and covers topics such as rocks and minerals, weathering, soils, geologic time, structural geology, plate ... Full description.

This geospatial animation shows sea level rising across the land bridge between Siberia and Alaska. During the last Glacial Maximum (~21,000 years ago), the Bering Land Bridge was a vast tundra plain connecting Asia and North America. At that time, the global sea level was 120 meters lower than it is today. Melting ice sheets and glaciers caused the sea level to rise and flood the land bridge. A QuickTime ... Full description.