Top : Science : Earth Sciences : Geology : Geomorphology :
Impact Craters
Websites
Text describing formation of impact craters. Images, glossary.
http://www.lpi.usra.edu/publications/slidesets/craters.html
Background info on the Chicxulub impact crater at the K/T (Cretaceous/Tertiary) boundary with photos of the 2001 NASA/Planetary Society expedition to Belize and Mexico to study and gather ejecta samples.
site exerpt
Home Page A cooperative endeavor to gather geologic data on the Chicxulub impact ejecta in Belize and Mexico January 16 28, 2001 On January 16th, 1991, the United States began offensive operations against Iraq in the Persian Gulf War. At the time,...World map of impact sites, details on the Chicxulub site, and details on environmental effects of impacts.
site exerpt
Terrestrial Impact Cratering and Its Environmental Effects Impact cratering is the dominant geologic process in the solar system. It has affected all terrestrial planetary surfaces, producing battered surfaces on Mercury, the Moon, and in the southern highlands of Mars. Impact craters on Mars, Mercury and the Moon...Investigates the possibility they have been caused by comet fragments.
site exerpt
Three Craters in Israel One can hardly view the actual Little Crater without thinking, What happened The Little Crater is an ellipse 5.6 miles long and 3.1 miles wide. It looks like a giant explosion had taken place to form the crater. The following...Official site for the visitors center at the Barringer meteor crater. Short history, animations, visitor information.
site exerpt
Meteor Crater Home If you see this line you will need a JavaScript capable browser. Or, JavaScript is turned off for your current browser....Images and short explanations of geologic features near the rim of the Barringer meteor crater.
site exerpt
The Meteorite Exchange, Inc Meteor Crater, Northern Arizona, USA This page uses frames, but your browser doesn't support them....Travelogue of a geology class field trip to the Barringer meteor crater. Images, crater description, topographic map.
site exerpt
Home Page The quality of the images will be related to your monitor's resolution capability and screen settings, its contrast and brightness adjustments, and your video card. This colorful bar should be a graduated rainbow with red at both ends. Look for...Map of crater locations in Canada, crater images, explanation and images of rock altered by impact.
site exerpt
MIAC Impact Craters Canadian impact structures. The map shows the locations of meteorite impact structures recognised in Canada. An updated list of Canadian impact sites is included in the annual Observer's Handbook of the Royal Astronomical Society of Canada Courtesy Richard Grieve, Geological...Overview of crater formation.
site exerpt
Impact Craters of the Earth Earth is constantly exposed to meteorite impacts. Small meteorites are braked in the atmosphere, whereas the bigger meteorites strike the surface with cosmic velocity. These meteorite impacts cause the instantaneous discharge of their energy and formation of the meteorite craters....The answer given in an article from Scientific American.
site exerpt
Science Technology at Scientific American.com: Ask the Experts: Geology: Why are impact craters always round? Most incoming objects must strike at some angle from vertical, so why don't the majority of impact sites have elongated, teardrop shapes? Why are impact craters always round? Most incoming objects must strike at some angle from vertical, so why don't the majority of impact sites have elongated, teardrop shapes? Richard Schroeder Dallas, Tex. Gregory A. Lyzenga, associate professor of physics at...Computer rendering of Chicxulub crater, from gravity and magnetic field data.
site exerpt
APOD: 2000 February 26 Impact: 65 Million Years Ago Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2000 February 26 Impact: 65 Million Years Ago Credit: courtesy V.L. Sharpton, LPI Explanation: What killed the...Image taken from space shuttle Columbia in 1983.
site exerpt
APOD: 2000 December 13 Manicouagan Impact Crater on Earth Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2000 December 13 Manicouagan Impact Crater on Earth Credit: STS-9 Crew, NASA Explanation: The Manicouagan Crater in...Aerial photograph.
site exerpt
APOD: July 11, 1999 Barringer Crater on Earth Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. July 11, 1999 Barringer Crater on Earth Credit: D. Roddy (LPI) Explanation: What happens when a meteor...A program that relates crater size to projectile size.
site exerpt
Crater This is a short routine to evaluate the scaling equations to determine the diameter of a crater given details on the nature of the projectile, conditions of impact, and state of the target. The transient crater diameter is evaluated by...NASA JPL article on the Chicxulub crater. An image from the Shuttle Radar Topography Mission shows an elevation feature of the crater. The article gives background information and interpretation of the image.
http://www.jpl.nasa.gov/earth/features/chicxulub.cfm
Background information, images, list of craters, references.
site exerpt
Terrestrial Impact Craters I appear to have been like a boy playing upon the seashore and diverting myself by now and then finding a smoother pebble or prettier shell than ordinary, while the great ocean of truth lay before me all undiscovered Sir...Multinational program to obtain and study core samples.
site exerpt
Chicxulub Scientific Drilling Program News For detailed information on documentation and dissemination of samples curated by Jan Smit please go to Sampling the K/T Boundary Presentations at EGS-AGU- EUG Joint Assembly, Nice, France 6 11. April 2003 Daily Drilling Reports 2002_02_27 2002_02_26 2002_02_25 2002_02_24 2002_02_23...Geology, geophysics, and petrology of impact structures (meteorite impact craters) with special focus on the Azuara and Rubielos de la Cérida impact structures (Spain)
site exerpt
Ernstson Claudin impact structures Impact structure and meteorite crater glossary Database of Earth Impact structures Map Spain France Germany Suevite page Shatter cone page Impact melt page Impact breccia page Geophysics of impact structures The controversy References Sundries Links Contact (die deutsche Version finden...Images and descriptions of craters in Africa, research activities of the terrestrial impact cratering research group of the University of the Witwatersrand.
site exerpt
Terrestrial Impact Cratering Investigations Several sessions of oral presentations, as well as a large number of poster contributions at the recent 62nd Annual Meeting of the Meteoritical Society dealt exclusively with meteorite impact cratering studies, many of them presented by staff and students from...Online book. Detailed introduction and overview of impact processes, crater formation, and shock metamorphism.
site exerpt
Traces of Catastrophe The public regards them as the established destroyer of dinosaurs and the possible destroyer of civilization. Increasing numbers of geoscientists are coming to appreciate the importance of meteorite impact events and the extent of their influence on the geological and...Online calculator for effects of asteroid impact.
site exerpt
Solar System Collisions Send an asteroid or comet hurtling toward your favorite planet! Target: Mercury Venus Earth (land only) Earth the Moon Mars Jupiter Saturn Uranus Neptune Pluto Projectile Composition: Ice Rock Iron Projectile Diameter: micron(s) centimeter(s) meter(s) kilometer(s) Projectile Velocity Kilometers per...