[meteorite-list] What is this structure?

From: Aleksandr Leonenko <alphoto_at_meteoritecentral.com>
Date: Sat, 27 Oct 2012 21:59:01 +0400
Message-ID: <1351360741.619541.28016.25052_at_saddam3.rambler.ru>

Hello!
I would like to know: what is shown in the photo - sinkhole or crater? A diameter of 15 meters. About 0.5 meters deep sand bars, followed by a hard green clay. Around the structure - a shaft of up to 60 centimeters. Unfortunately we do not have metal detectors, check for debris we can not.
What is this structure?

http://imageup.ru/s1085718
http://imageup.ru/s1085719

Sincerely.
Alexander.
Received on Sat 27 Oct 2012 01:59:01 PM PDT