Monday, July 30, 2018

The Twin Eau Claire Craters of Northwestern Quebec


Description:
This NASA Earth Observatory image titled “A One-Two Punch” exhibits a double crater landscape in northwestern Quebec. This event was originally believed to have been the result of a binary asteroid in the Carboniferous Period. The Eau Claire lakes have the unique round shape of complex craters including peak rings caused by the impact, forming a small, rounded chain of islands. The limited topsoil of the area leads to the grey-tan shade of the landscape and limited vegetation cover. This unique, tundra like landscape is the result of glacial scraping that formed elongated lake shapes but left the craters in the bedrock. They removed the lighter debris and impact mounds of the older-than-glacial craters, revealing their extent and shape. The larger lake, Eau Claire West, is 36 km (22mi) in diameter with the smaller eastern lake being 26 km (16 mi) in diameter.

It has recently (2014) come to light that the craters were likely formed about 200 million years apart from each other.
They say lightning doesn't strike the same place twice, but I guess asteroids might? 

Coordinates: 56°08′N 74°18′W 

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