A column in the karst
Postojna Cave · 30 August 2023
The Slovenian karst is where the word comes from - the Kras plateau, limestone dissolved by water over millions of years into a landscape that drains almost entirely underground.
The pillar is a stalagmite and a stalactite that grew until they met and joined. They put on something like a tenth of a millimetre a year, so this one has been forming for the whole span of recorded history, several times over.
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