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Snow-covered mountain range with rocky ridges and soft blue shadows under a deep blue sky, seen across a smooth snowfield in the foreground. — The silence of the snow Anita Raimondi

Narrow slot canyon with smooth, wavy orange rock walls in fine layers, opening to a bright white sky above and a sandy floor with sunlit puddles. — Las Grietas: Miniature Canyons of Lanzarote Harald Crepaz

View down a mountain valley floor covered in pale boulders and flood debris surrounding a cluster of buildings, with steep grey slopes, a grassy rock in the foreground and a date stamp reading 2014 06 20 13 35. — Aftermath caused by Cloud Burst and Flood in Kedarnath, Uttarakhand, India Rahul Dixit

Shiny black chunks of obsidian with glassy curved surfaces on a rocky slope, with an orange and yellow mountain under a deep blue sky. — Obsidian rocks, Landmannalaugar, Iceland Ragnar Sigurdsson (arctic-images.com)

Sunset over Seville with pink, violet and reddish tones caused by smoke from the Niebla wildfire, about 60 km away. — Purple haze over the city Antonio Jordán

Terra rossa near São Brás de Alportel (southern Portugal) Antonio Jordán

Panorama of a large mound of grey broken rock with a ring-shaped rim around a central heap, set among green forested hills under a cloudy sky. — Patomsky crater (Eastern Siberia) Dmitry Demezhko

Portable gravimeter, a tall white cylinder, and stacked white equipment cases with a laptop and cables set up on bare rocky ground, with a broad expanse of jumbled ice behind. — Quantum Gravimetry meets a calving glacier in the Arctic Adam Ciesielski

Two people working beside a geyser jetting white steam on a barren brown plain, with equipment and a cable reel on the ground and snow-dusted hills behind. — Revealing geyser dynamics at The Three Vicuñas Wouter Deleersnyder

Close-up of fingers holding a small round concretion, its broken face orange-brown with patches of black coating, against a blurred blue sky and red ground. — Manganese and iron covering a carbonate concretion Antonio Jordán

Ptygmatic fold: a pale orange-pink vein twisting in tight snake-like loops across a dark, finely banded grey-brown rock face dotted with lichen. — Ptygmatic fold in paragneisses Sophie Graul

Wide, rugged grey rock riverbed pitted with countless potholes, a narrow gorge of dark water running through it, two people sitting on the rocks, an arched bridge behind. — Pothole Formation in the Kukadi River at Nighoj Namdev Telore

Diagram of four overlapping coloured circles labelled Atmósfera, Hidrosfera, Litosfera and Biosfera, with the word Suelo in the area where all four overlap. — El suelo en la interfase Antonio Jordán

Soil phases Antonio Jordán

Smiling child holding up both hands stained bright orange-red with clay, with smears of it on one cheek, in front of a blurred green and red-earth background. — A mini-experiment by a mini-scientist Antonio Jordán

Wide green grassland covered with hundreds of small rounded grassy mounds, stretching to low blue mountains under a cloudy sky. — Meiren Grassland in Gannan Tibetan Autonomous Prefecture Zi Wang

Ptygmatic fold in a dark grey boulder: pale pink veins twist through the rock in tight, irregular zigzag loops, with a black pen for scale and sand at the base. — The ptygmatic fold in nature, South Sinai, Egypt Metwally Hamza

Large round reddish-brown concretion shaped like a cannonball resting on furrowed grey clay slopes, below a vertical fluted badland wall with a brown capping layer. — Cannonball, concretion Silvia Favaro

Wall of bright orange flames rising behind rows of tall thin dark conifer trunks in a forest, with low green vegetation in the foreground. — Boreal forest fire in Canada Stefan Doerr

Aerial view of steep limestone mountain ridges whose pale rock layers are tilted almost vertical, with green grassy slopes between them, a deep shadowed valley and a building with a mast on the left summit. — Helvetic Nappes of Switzerland Kurt Stuewe

Rounded boulder half buried in brown soil, its outer shell peeling away in thin curved layers like onion skin around a pale grey core. — Onion skin weathering by thermal stress Antonio Jordán

Aerial view of a river delta: winding brown channels carry silty water between green vegetated islands, shallow purple-tinged water and pale sandbars. — Where the Selenga River meets the Lake Baikal Galina Shinkareva

Fingers hold a small moss-covered object against a blurred coastal backdrop. — Every Little Thing Counts Antonio Jordán

Black-and-white view of a small remnant glacier in a rocky cirque below jagged dark peaks, its striped ice surface patched with snow and covered by rock debris at its lower edge. — Farewell to a Swiss glacier - Verbier, Switzerland Janosch Beer

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