Post on 03-Jan-2016
description
Impact CratersMeteorites & Asteroids
Meteorite Impacts*
• Meteoroids < 1m in diameter tend to burn up in atmosphere
• Meteoroids > 1km can cause much damage
• Earth has more than 100 craters > 0.1km in diameter.
*Notes from meteor handout
Asteroid Impacts*
• There are many large basins and eroded craters that are suspected to be ancient asteroid sites.
• An asteroid that is 1 km in diameter has more energy than 100 times all the nuclear weapons in the world right now.
*Notes from meteor handout
How are craters formed?
Check out website:
• http://miac.uqac.ca/MIAC/crater.htm
Some craters in the world
Eslöv meteor
• Located in Eslöv Biennale, Sweden.
• Hit ~6:00 am on November 3rd, 2007
• Crater ~ 15 m in diameter
http://www.genetologisch-onderzoek.nl/index.php/136/anthropology/archaeologie/
Barringer crater*
• Located in Arizona, USA
• Weighs approx. 200,000 tons
• Meteor was ~ 50m in diameter(~1/2 soccer field)
• Crater - 1.186 km diameter
*Notes from meteor handout
http://www.solarviews.com/eng/tercrate.htm
Manicougan Crater
• Located in Quebec, Canada.
• ~200 to 300 million years old
• ~95 km across• 5th largest
http://www.scienceclarified.com/scitech/Comets-and-Asteroids/When-Comets-and-Asteroids-Strike-Earth.html
Kara-Kul
• Located in Parmir Mountains in Tajikistan.
• ~45km diameter
http://www.etsimo.uniovi.es/solar/cap/earth/karakul.htm
Clear Water Lakes Crater
• Located in Quebec, Canada.
• Only example on earth of pair impact craters.
• Demonstrate multiple hit of cometary debris
• Larger crater ~32 km• Smaller crater ~22 km
http://w ww.morien- institute.org/impact_craters.html
Mistastin Lake crater,
• Located in Nfld & Labrador, Canada
• 28 km diameter
http://www.solarviews.com/cap/earth/mistastn.htm
Deep Bay Crater
• Located in Saskatchewan, Canada
• ~13 kilometer diameter
• ~100 million years old
http://www.solarviews.com/eng/tercrate.htm
Wolfe Creek Crater
• Located in Wolfe Creek National Park, Australia
• ~0.875km diameter• Crater rim raises
~25m above plain level
• Crater floor is ~50m below crater’s rim
http://www.solarviews.com/cap/earth/wolf.htm
Impacts around the world
• Nifty website!http://geology.com/meteor-impact-craters.shtml