Anticline in the Paleoproterozoic Thomson Formation, near Jay Cooke State Park, Northeast #Minnesota. Deformation due to the Penokean Orogeny, ca 1850–1900 Ma. This is a favorite fieldtrip stop; included in the GSA Centennial Guidebook. An October picture from the archives. #geology #FridayFold πŸ§ͺβš’οΈ
Anticline in the Paleoproterozoic Thomson Formation, near Jay Cooke State Park, Northeast #Minnesota. Deformation due to the
Penokean Orogeny, ca 1850–1900 Ma. This is a favorite fieldtrip stop; included in the GSA Centennial Guidebook. An October picture from the archives. #geology #FridayFold πŸ§ͺβš’οΈ
We hoped for a #FridayFold but I think we *mist* it. Fog off! βš’οΈ #geology
There's no way the Bundesverband Geothermie fell for it and features this AI generated fake fold on their online encyclopedia. #geothermal #geology #FridayFold
#FridayFold below the peak of Schilthorn mountain, Switzerland. #FoldFriday #Geology
#FridayFold! Punta das Cabras, Galicia (Western Asturian-Leonese Zone of the Variscan orogen), where one can find many striking examples of high-strain folding within shear zones. Recumbent to sheath fold in quartzites & micaschists in the basal part of the CΓ‘ndana Gp. (Lower Cambrian) #geology βš’οΈπŸ§ͺ
#FoldFriday or is it #FridayFold ? Anyway , freshly bathed in this morning's early light, here's a lovely wee fold in kyanite-grade Moine schists above Loch Assapol in Mull. Fingertip at left for scale. 😊πŸ₯° #Geology #Mull #Metamorphic

#FridayFold An old picture of a limpet enjoying some beautiful folded greenschist-facies pelite in a rock pool near Thundergay, on the west coast of Arran. The pale bands are rich in fine-grained muscovite; the dark bands also have chlorite. The few rusty spots mark the position of pyrite crystals.

#Geology #Deformation #Folding #Metamorphic #Dalradian #Arran