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The crystalline rocks of the Felsenmeer are evidence of the collision of two primeval continents in the ancient Earth around 340 million years ago. The "quartz diorites" were formed from molten rocks that formed as a result of the collision and cooled in the Earth's crust at a depth of around 12 km. The "Variscan Mountains", which were also formed when the continents collided, were subsequently eroded, meaning that the rocks that cooled deep in the Earth's crust are now directly on the surface. The quartz diorite blocks acquired their special rounded shape - experts call them "wool sacks" - in the Tertiary period around 50 million years ago when weathering prevailed in our region in a subtropical climate. Acidic precipitation penetrated the fissured rock bodies on the surface, causing the rock minerals to decompose deeply. The rock became deeply encrusted from the cracks, and only rounded "rock cores" were spared. More information, 3D models and impressions at https://www.digitalgeology.de The German Geological Society - Geological Association eV - DGGV is one of the oldest scientific organizations in Germany. On the occasion of the 175th anniversary of the German Geological Society and its successor organizations in 2023, we have initiated the 30 Geotope³ project. The 30 Geotope³ project aims to document the most visually appealing and scientifically significant outcrops in Germany. The focus is on digital and three-dimensional recording. The outcrops are georeferenced using cameras (including drones and 360-degree cameras), laser scanners and d-GPS. The presentation of the individual locations has been done monthly since February 2021 on the project website https://www.digitalgeology.de All data recorded as part of the project is made freely available. The project involves many geoscientific institutions, such as geoparks, state geological offices and universities and is therefore cross-site. _______________________________________________________________________________________________ _______________________________________________________________________________________________ Animation from: Scotese, CR, 2016. Plate Tectonics, Paleogeography, and Ice Ages, (Modern World - 540Ma), YouTube Animation • Plate Tectonics, 540Ma - Modern Worl...