Geography Question

arcylon · 07-05-2005, 12:05 AM

I've just posted the location of some strange circular lakes in the random files section. Anybody know what they are?

http://www.googleearthhacks.com/foru...?do=file&id=51

Mickey · 07-05-2005, 08:29 PM

Wow, good find. I have no idea what they are, but maybe someone else will be able to help out.

GeoDave · 07-05-2005, 08:48 PM

The circular depressions are thermokarst lakes formed by melting permafrost. There is a useful account of these at:

http://users.skynet.be/ougseurope/su...ermokarst.html

arcylon · 07-05-2005, 08:51 PM

Thanks very much! Thought they might have been maars, but they're too widespread. Looks like permafrost does some interesting stuff!

Mickey · 07-05-2005, 09:46 PM

Nice work, GeoDave! I've edited the listing on that file to include this new information.

Mickey

07-05-2005, 12:05 AM	#1
arcylon Junior Member Join Date: Jul 2005 Posts: 2	Geography Question I've just posted the location of some strange circular lakes in the random files section. Anybody know what they are? http://www.googleearthhacks.com/foru...?do=file&id=51

07-05-2005, 08:48 PM	#3
GeoDave Junior Member Join Date: Jul 2005 Location: Kent, UK Posts: 1	Thermokarst lakes The circular depressions are thermokarst lakes formed by melting permafrost. There is a useful account of these at: http://users.skynet.be/ougseurope/su...ermokarst.html

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07-05-2005, 08:29 PM	#2
Mickey Administrator Join Date: Jun 2005 Posts: 2,328	Wow, good find. I have no idea what they are, but maybe someone else will be able to help out.

07-05-2005, 08:51 PM	#4
arcylon Junior Member Join Date: Jul 2005 Posts: 2	Thanks very much! Thought they might have been maars, but they're too widespread. Looks like permafrost does some interesting stuff!

07-05-2005, 09:46 PM	#5
Mickey Administrator Join Date: Jun 2005 Posts: 2,328	Nice work, GeoDave! I've edited the listing on that file to include this new information. Mickey