1. Impact Craters Meteorites & Asteroids

2. 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

3. 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

4. How are craters formed? Check out website:

5. Some craters in the world

6. Eslöv meteor Located in Eslöv Biennale, Sweden.
Hit ~6:00 am on November 3rd, 2007
Crater ~ 15 m in diameter

7. Barringer crater* Located in Arizona, USA Weighs approx. 200,000 tons
Meteor was ~ 50m in diameter
(~1/2 soccer field)
Crater km diameter
*Notes from meteor handout

8. Manicougan Crater Located in Quebec, Canada.
~200 to 300 million years old
~95 km across
5th largest

9. Kara-Kul
Located in Parmir Mountains in Tajikistan.
~45km diameter

10. 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

11. Mistastin Lake crater, Located in Nfld & Labrador, Canada
28 km diameter

12. Deep Bay Crater Located in Saskatchewan, Canada ~13 kilometer diameter
~100 million years old

13. 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

14. Impacts around the world
Nifty website!