National Geotope "Porphyry Fan"

The “Porphyry Fan” National Geotope at Schmieders Graben is the highlight of the geological open-air museum in the Tharandt Forest.

The Porphyry Fan was designated a natural monument in 1958 and a National Geotope in 2019. The rock here is a “low-quartz porphyry” (reddish-brown to grayish-violet), a volcanic rock with numerous porous, reddish-streaked inclusions and an age of approximately 300 million years. The jointing forms a fan shape, which gave the former quarry its name (cooling cracks).

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Getting there

A4 highway, Wilsdruff exit, take Wilsdruffer Straße to Grumbach, follow the B 173 to Mohorn, then turn onto the street "Am Tharandter Wald" and continue to the entrance to Grund

National Geotope "Porphyry Fan"Address and Contact

Schmiedersgrabenweg

01723 Wilsdruff OT Mohorn

Get directions

+49 35055 696820 kontakt@geopark-sachsen.de Open website