The Zion Natural History Association (ZNHA) is a non-profit organization established in 1931 to support education, research, publication and other programs for the benefit of Zion National Park, Cedar Breaks National Monument, and Pipe Spring National Monument. Visitors to this site can acess information about the scientific, educational, historical, and interpretive activities of the Association ... Full description.

This set of links provides users with access to a variety of lesson plans and activities about volcanoes. Full description.

Students may read and view pictures about how to become a volcanologist. Educational requirements and likely places where volcanologists may work are covered. Links to related sites are provided. Full description.

This collection of computer-generated animations shows glaciers and glacial landforms in the vicinity of Glacier Bay, Alaska. An introductory animation shows how the "fly-bys" are created. Full description.

This animation shows the retreat of the Muir Glacier between 1941 and 1982. A scale bar gives some idea of the distance involved. Full description.

The aerial video and still photography assembled here allows users to see "before" and "after" imagery of the impacts of coastal storms. Oblique images are available for storms from Hurricane Ivan in 2004 to Hurricane Fran in 1996. Each set of images is accompanied by a brief description, and some LIDAR imagery is avaliable. Links to other related sites are also included. Full description.

This satellite image shows the brown sediment-laden water of the Mississippi River mixing wih the dark blue water of the Gulf of Mexico following a rainstorm. The city of New Orleans and Lake Ponchartrain can easily be discerned near the center of the image. Full description.

Visitors to this site can view satellite imagery and read an account of how remote sensing was employed to evaluate the extent of flooding and sediment load in rivers on the coastal plain of North Carolina as a result of Hurricane Floyd in September, 1999. This feature is part of NASA's Earth Observatory, a publication that focuses on Earth's climate and environmental change. Full description.

Deserts are classified by their location and dominant weather pattern into several types: trade wind, midlatitude, rain shadow, coastal, monsoon, or polar deserts. Former desert areas presently in nonarid environments are paleodeserts, and extraterrestrial deserts exist on other planets. This site, produced by the U.S. Geological Survey, describes each type of desert using text and photographs. Full description.

The most profound deformational event involving the interaction of lithospheric plates is a collision between continents; for example, the collision of the Indian continent with the Eurasian continent, which began in the Eocene. This continuing collision has produced intracontinental thrust sheets responsible for the highest mountains in the world. Mount Everest, the Annapurna Range, and the rest ... Full description.