Bernard Spragg: PAPAROA NATIONAL PARK. Punakaiki .
rwgabbro1: Celebrating the Cream City's Urban Geology: Milwaukee in Stone and Clay (2024)
spelio: B1R4-41 Macro of Aragonite Crystals in the roof with finger nail
rwgabbro1: From Persimmon Gap to Boquillas Canyon, Part 13: Oh, What a Beautiful Faulting; Big Bend National Park, Texas, USA
sdttds: Tafoni cliff at Pt Reyes Lighthouse
rwgabbro1: Architectural Geology of Dougga, Tunisia, Part 5: Another View of the Mausoleum of Ateban (2nd century BC) and the Diapir Zone
spelio: B3R58-102 Pompey's Pillar from Moralana Creek framed
ChPflügl: IMG_2652
ChPflügl: IMG_2620
rwgabbro1: From Persimmon Gap to Boquillas Canyon, Part 12: Chiaroscuro Canyon, Big Bend National Park, Texas, USA
spelio: the magnetic soil around the Millstream campground
spelio: Amazing eroded rocks
rwgabbro1: In and About Tuff Canyon, Part 9: Learning to Live with Ambiguity, Big Bend National Park, Texas, USA
ChPflügl: IMG_2440
ChPflügl: IMG_2439
ChPflügl: IMG_2436
rwgabbro1: From Persimmon Gap to Boquillas Canyon, Part 11: Approaching the Mouth of Boquillas Canyon, Big Bend National Park, Texas, USA
Perkins-Boyer Photos: Cat Ba Archipelago
rwgabbro1: A Geology Guidebook Author's Dream Come True . . .
Perkins-Boyer Photos: Cat Ba Archipelago
Kira Pichano: Ancient megalith rock
rwgabbro1: The Brownstone Chronicles, Part 22: Detail of Old City Hall, Marquette, Upper Peninsula of Michigan, USA (1894)
rwgabbro1: Architectural Geology of Segovia, Spain, Part 23: San Juan de los Caballeros Church (late 11th Century AD)
Schnauzerfreund: Feuersteinklippe
Schnauzerfreund: Höhle an der Teufelsmauer (Timmenrode,Harz)
Schnauzerfreund: Höhle an der Teufelsmauer (Timmenrode,Harz)
Schnauzerfreund: Teufelsmauer (Harz)
Schnauzerfreund: Teufelsmauer (Harz)
rwgabbro1: A Marvel of Masonry, Part 6: The Palace of the Porphyrogenitus (late 13th Century) and the Blachernae Walls (different sections in different centuries), Istanbul, Turkey
Denis Trente-Huittessan: Château de de Montrottier - Lovagny (Haute-Savoie, France)