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.

Biosphere reserves are sites recognized under UNESCO's Man and the Biosphere Programme which innovate and demonstrate approaches to conservation and sustainable development. They are internationally recognized, nominated by national governments and remain under sovereign jurisdiction of the states where they are located. Biosphere reserves serve in some ways as 'living laboratories' for testing out ... 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.

This educator guide provides information and activities related to meteorites and their origins. Topics include sources and collection of meteorites, meteorite mineralogy and classification, famous meteorite falls, and others. 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.

This teacher's guide provides background information about the moon, its geological history, and progress in lunar science from before, during, and after the Apollo program. A set of activities is provided to demonstrate such concepts as scale models, proportional relationships, rock and mineral identification, and lunar geography. Full description.

Users of this portal can access information on mountains, islands, and other landforms of the Earth. Links are provided to a variety of materials, including books, maps, atlases, photographs and imagery, games and quizzes. 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.

This site allows users to browse Earth science-themed photographs including 3-D images, historic NASA photographs, and images from satellites and manned space missions. 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.