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Clearwater Lakes, Quebec, Canada

Target Name:  Earth
Spacecraft:  Space Shuttle
Produced by:  NASA
Copyright: Copyright Free
Cross Reference:  STS61A-35-86
Date Taken:  1985-11-01

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NameTypeWidth x HeightSize
clearwater.jpgJPEG640 x 645109K
clearwater.jpgJPEG1452 x 1464422K
clearwater.jpgJPEG2904 x 29281M

NameClearwater Lake West
Location56°13'N, 74°30'W
Rim diameter32 kilometers (20 miles)
Age290 +- 20 million years

NameClearwater Lake East
Location56°05'N, 74°07'W
Rim diameter22 kilometers (13.7 miles)
Age290 +- 20 million years

These twin circular lakes (large dark features) were formed simultaneously by the impact of an asteroidal pair which slammed into the planet approximately 290 million years ago. The lakes are located near the eastern shore of Hudson Bay within the Canadian Shield in a region of generally low relief in northern Quebec province. Notice that the larger western structure contains a ring of islands with a diameter of about 10 kilometers that surrounds the center of the impact zone. They constitute a central uplifted area and are covered with impact melts. The central peak of the smaller Clearwater Lake East is submerged. The lakes are named after their exceedingly clear water. Also notice that the surrounding terrain shows widespread scarring from glaciation. The multitude of linear and irregular shaped lakes (dark features) are the result of gouging or scouring action caused by the continental ice sheets that once moved across this area.

Copyright © 1995-2016 by Calvin J. Hamilton. All rights reserved.