How to classify this formation?



http://maps.google.com/?ie=UTF8&ll=55.844073,37.410936&spn=0.017155,0.039911&t=k&om=1

What is this? Impact Crater? Karst collapse? Or, could it be formed as
flood-lands from the very beginning?


What kind of additional features should be taken into account when
visiting this place (without drilling, excavating etc.)

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Relevant Pages

  • Re: How to classify this formation?
    ... Impact Crater? ... Karst collapse? ... flood-lands from the very beginning? ... What kind of additional features should be taken into account when ...
    (sci.geo.geology)
  • How to classify this formation?
    ... Impact Crater? ... Karst collapse? ... flood-lands from the very beginning? ... What kind of additional features should be taken into account when ...
    (sci.geo.geology)