References
Meteorite Impacts and Effects Page

Figure: Deep Bay - Saskatchewan, Canada
(Near circular, 8 mile diameter, 50-150 million years old)

Information was primaliary taken from:

Calvin J. Hamilton's Web Page - Terrestrial Impact Craters

Other sources:

Rosanna L. Hamilton and Calvin J. Hamilton - Meteoroids and Meteorites, 1995,96

International Meteor Organization (IMO) - NAMN Fireball Report Form (USA)

Niels Bohr Institute, Geophysical Dept.

James Richardson, AMS Operations Manager / Radiometer Project Coordinator and James Bedient / AMS Electronic Information Coordinator

Paul Wiegert and Kimmo Innanen, Dept. of Physics and Astronomy, York University, North York, Ontario, Canada

Seppo Mikkola, Tuorla Observatory, University of Turku, 21500 Piikkio Finland