The "eggs" remind me of the round stones found in glacial mills
http://www.gletschergarten.ch/Garten.4.0.html http://www.igsoc.org:8080/journal/1/9/igs_journal_vol01_issu...
http://www.gletschergarten.ch/Garten.4.0.html http://www.igsoc.org:8080/journal/1/9/igs_journal_vol01_issu...
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