Around Lodintörl it is possible to observe the imposing, almost white, limestone relief of the Auernig Formation, or what is presumed to have been a limestone reef. Here, in a marine habitat characterized by optimal conditions, living organisms were able to reproduce in large quantities and contribute to the formation of the reef.
South of the Italian – Austrian international border is an almost circular pit formed by erosion and about 200 metres in diameter. This is a doline or sinkhole, a karst phenomenon with a conical funnel shape. The name derives from the Slovenian word meaning “valley”.

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