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Courtesy of the Jet Propulsion Laboratory
Shooting stars are not, of course, really stars. They are actually small bits of rock and metal that collide with Earth's upper atmosphere and, because of friction, burn up. On rare occasions, man-made satellites and spacecraft parts fall into the atmosphere and burn up the same way.
By: Alan Morgan
This satellite view clearly shows the Manicouagan impact site. The ring is developed in impact breccias that were eroded by glaciation and have subsequently been flooded. The circular structure is 70 km in diameter, but the impact site is approximately 100 km wide. Impact shock structures are well developed in the surrounding bedrock of the Canadian Shield. Since this crater is slightly over 200 million years old, the original rim has been removed by erosion. Also on the picture is the Sudbury impact site, as well as Wanapitei crater (not indicated, but close to Sudbury).
By: Ed Freeman, Toronto
Paul Karrow,
Quaternary Sciences Institute,
University of Waterloo,
Waterloo, Ontario,
N2L 3G1
Publication QSI PFK 11
But this bar is dry! Yessir, you'll get mighty thirsty looking for a drink at this bar! When I tell you this bar is actually an old beach, you needn't run to get your bathing suit either, `cause the water's long gone!
By: Paul Karrow
By: Paul Karrow,
Quaternary Sciences Institute,
University of Waterloo,
Waterloo, Ontario,
N2L 3G1
Publication QSI PFK 12
By: Jason M. Payne
By: Joe Hannibal, Cleveland Museum of Natural History