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Satellite view of Clearwater Lakes in Quebec, Canada
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Satellite view of Clearwater Lakes in Quebec, Canada
June 29, 2013 - Satellite view of Clearwater Lakes in Quebec, Canada. About 290 million years ago, two large asteroids smashed into Earth. The massive craters they left behind, now lakes, are still visible from space.
When they struck, the binary asteroids crashed into a part of Earthas crust that was fairly close to the equator. Since then, millions of years of plate tectonics have pushed the craters north into what is now northwestern Quebec.
20, 000 years ago massive sheets of ice covered northwestern Quebec, much like ice now covers Antarctica and Greenland. During that period, ice sheets repeatedly advanced and retreated, scouring the land of soil and rock during cool periods, and then carving deep channels and rinsing the landscape with melt water during warmer periods. The impact of that glacial scouring is evident. The area has little topsoil and supports only sparse vegetation such as spruce forests, grasses, and mosses. The erosion was so complete that many land surfaces were scraped down to underlying bedrock, exposing some of the oldest rocks in the world. Meanwhile, the melt water from retreating glaciers left a dense network of linear lakes and streams that now dominate the surface.
Clearwater East and Clearwater West are both complex craters with distinct central peaks. These peaks are caused by the gravitational collapse of crater walls and subsequent rebound of the compressed crater floor. Lake water covers the central peak of Clearwater East, but bathymetric surveys of the lake floor confirm the presence of a peak in its center
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Media ID 13060523
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Canada Cartography Climate Cold Temperature Crater Earth Observation Erosion Full Frame Geography Glacier Hudson Bay Lake Land Meteorology Overhead View Physical Geography Quebec Satellite View Square Image Topography Weather View From Space
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This print showcases the satellite view of Clearwater Lakes in Quebec, Canada. The image takes us back 290 million years ago when two colossal asteroids collided with Earth, leaving behind these remarkable craters that are still visible from space today. Originally located near the equator, plate tectonics over millions of years have gradually shifted these craters to their current position in northwestern Quebec. Around 20,000 years ago, this region was covered by massive sheets of ice resembling Antarctica and Greenland today. As the ice sheets advanced and retreated during different climatic periods, they sculpted the landscape through glacial scouring and meltwater erosion. Consequently, little topsoil remains in this area, resulting in sparse vegetation comprising mainly spruce forests, grasses, and mosses. The intense erosion even exposed some of the oldest rocks on our planet. The impact of retreating glaciers also left behind a dense network of linear lakes and streams that dominate the surface today. Among them are Clearwater East and Clearwater West - complex craters featuring distinct central peaks caused by gravitational collapse and subsequent rebound of crater walls. This awe-inspiring photograph not only captures the beauty of nature but also serves as a reminder of Earth's ancient history etched into its very surface. It is a testament to the immense forces at play throughout time that continue to shape our world as we know it.
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