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glatt · 06-01-2010, 08:59 AM

It's amazing to me how these sinkholes end up having such vertical sides. I'd expect the sides to collapse inward, creating a funnel shape.

06-01-2010, 08:59 AM	#14
glatt ™ Join Date: Jul 2003 Location: Arlington, VA Posts: 27,717	It's amazing to me how these sinkholes end up having such vertical sides. I'd expect the sides to collapse inward, creating a funnel shape.