This page describes the different types of calderas: Crater-Lake type calderas, which are associated with the collapse of stratovolcanoes; basaltic calderas, which result from the summit collapse of shield volcanoes; and resurgent calderas, which lack an association with a single centralized vent. Each type is described in detail with photographs, maps, diagrams, and examples. Multiple links lead ... Full description.

MOLA-based animations showing Martian topography as both color and elevation. The exaggeration is 3x. This was created for a talk James Garvin will give on The Hill in late April 2002. Full description.

This information about the Lunar Prospector mission to the Moon discusses the possibility that ice exists on the lunar surface. The article indicates that no native water ice has been found on the moon. If ice has been found, it most likely originated from meteors and meteorites which periodically bombard the lunar surface. Full description.

This is the Image for Magnetopause-to-Auroral Global Exploration (IMAGE) archive of weekly math, science, reading and art problems. New problems involving near-Earth space technology are emailed to participating teachers each week on Tuesday. The problems can be used in related lessons or as extra credit assignments. This web page is part of the outreach program of the IMAGE Satellite team to give ... Full description.

These activities and resources are related to NASA's Lunar Reconnaissance Orbiter (LRO) and were developed for use by libraries. The module is part of Lunar and Planetary Institute's Explore! program. 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.

This teacher's guide with activities supports lessons on the earliest history of the Solar System and meteorite impacts on Earth. Full description.

This database contains information on confirmed impact structures around the world. A series of interactive maps, one for each continent, shows the locations of impact structures. Users can roll their mouse over the locations to see structure names and click on them to access physical information such as location (latitude and longitude), diameter, age, maps, photos, cross-sections (where available), ... Full description.

This United States Geological Survey (USGS) fact sheet summarizes historical data (from 1760 to 1999) on 41 Alaskan volcanoes, using information drawn from the more thorough and comprehensive USGS Open-File Report 98-582. Summaries include the volcano type, location (latitude and longitude), location on USGS quadrangle map, and any information available about the dates of eruptions and type of volcanic ... Full description.

SciNews provides middle and high school teachers timely, pre-packaged lessons on a science current event (such as an oil spill, earthquake, or shuttle launch) that are short (~15 min), easy to implement, and align to AZ state standards. Each current event lesson has an associated PDF document that contains a brief overview of the event and lesson, as well as a map, photo(s), and AZ standards targeted ... Full description.