http://sibved.livejournal.com/ ([identity profile] sibved.livejournal.com) wrote in [personal profile] sibved 2017-01-02 09:27 am (UTC)

https://nashural.ru/Mesta/pashiyskaya-peshera/pp18.jpg - как-будто черпали породу ложками, а если это эрозия, то почему так работает, а не вдоль трещин?
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