Yva Momatiuk & John Eastcott / Minden / Calcium tufa formations, Mono Lake, California
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Alex Hyde / Water cascading over naturally formed tufa dam. Tufa is a kind of limestone, formed from the precipitation of carbonate minerals which builds up around mosses and water plants to form a solid limeston...
Marie Read / Osprey (Pandion haliaetus) taking flight from tufa tower carrying a fish, Mono Lake, California, USA
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Jack Dykinga / Engelmann spruce (Picea engelmannii) growing amongst pinnacles of volcanic tuff, dawn, Wheeler Geological Area Wilderness, Rio Grande National Forest, Colorado, USA
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Jack Dykinga / Tufa pinnacles in the sunset afterglow at the edge of Mono Lake, Mono Lake State Reserve, California, USA
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Yva Momatiuk & John Eastcott / Calcium tufa formations, Mono Lake, California
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Tim Fitzharris / Full moon over Mono Lake with wind and rain eroded tufa towers and the eastern Sierra Nevada Mountains in the background, California
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Tui De Roy / Cerro Azul caldera with lake and tufa cone at 5,900 feet, Cerro Azul Volcano, Isabella Island, Galapagos Islands, Ecuador
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Yva Momatiuk & John Eastcott / Minden / Great Horned Owl (Bubo virginianus) pair on calcium tufa formation, Mono Lake, California
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Jack Dykinga / Salt encased Rabbitbrush (Chrysothamnus nauseosus) tufa towers at the lake's shoreline Mono Lake State Reserve, California, USA.
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Jack Dykinga / Narrow-leaved indian paintbrush (Castilleja) flowering among backlit grasses, and Tufa formations, Mono Lake Tufa State, California, USA.L
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John Shaw / Trona Pinnacles, tufa towers that are a USA National Natural Landmark, near Trona, California, USA, January.
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Marie Read / Wilson's Phalaropes (Phalaropus tricolor) flock flying over tufa formations at Mono Lake in late summer, with reflection, California, USA. July 2013. Mono Lake is an important staging site for sho...
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Marie Read / Wilson's Phalaropes (Phalaropus tricolor) large flock on the shore at Mono Lake in late summer, California, USA. July. Mono Lake is an important staging site (stopover site) for migrating shorebir...
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Floris van Breugel / Tufa towers along Mono Lake, which form as sodium carbonate reacts with calcium rich spring water. Mono Lake, California, USA. June 2017.
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Floris van Breugel / Tufa towers along Mono Lake, which form as sodium carbonate reacts with calcium rich spring water. Mono Lake, California, USA. September.
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Floris van Breugel / Tufa towers along Mono Lake, which form as sodium carbonate reacts with calcium rich spring water. Mono Lake, California, USA. June 2017.
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Floris van Breugel / Alkali fly (Ephydra hians) (top right), underwater in its air bubble, and pupal casings left behind by alkali fly larvae that have hatched into adults. The green is from algae that is trapped inside o...
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Alex Hyde / Water seeping through moss in naturally formed tufa dam. Tufa is a kind of limestone, formed from the precipitation of carbonate minerals which builds up around the mosses (Cratoneuron commutatum and...
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Alex Hyde / Water cascading over naturally formed tufa dam. Tufa is a kind of limestone, formed from the precipitation of carbonate minerals which builds up around mosses and water plants to form a solid limeston...
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Alex Hyde / Water cascading over naturally formed tufa dam. Tufa is a kind of limestone, formed from the precipitation of carbonate minerals which builds up around mosses and water plants to form a solid limeston...
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Enrique Lopez-Tapia / Bet Giyorgis Church, carved from solid limestone tufa rock, viewed from above to show the cross shape of the church. Lalibela. UNESCO World Heritage Site. Ethiopia, December 2014.
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Enrique Lopez-Tapia / Bet Giyorgis Church, carved from solid limestone tufa rock, viewed from above to show the cross shape of the church. Lalibela. UNESCO World Heritage Site. Ethiopia, December 2014.
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Enrique Lopez-Tapia / Bet Giyorgis Church, carved from solid limestone tufa rock, viewed from above to show the cross shape of the church. Lalibela. UNESCO World Heritage Site. Ethiopia, December 2014.
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Enrique Lopez-Tapia / Bet Giyorgis Church, a church carved out of solid tufa rock, view from the top showing its cross shape, Lalibela. UNESCO World Heritage Site. Ethiopia, December 2014.
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Enrique Lopez-Tapia / Bet Giyorgis Church, a church carved out of solid tufa rock, view from the top showing its cross shape, Lalibela. UNESCO World Heritage Site. Ethiopia, December 2014.
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Enrique Lopez-Tapia / Bet Giyorgis Church, a church carved out of solid tufa rock, Lalibela. UNESCO World Heritage Site. Ethiopia, December 2014.
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Enrique Lopez-Tapia / Bet Giyorgis Church, a church carved out of solid tufa rock, Lalibela. UNESCO World Heritage Site. Ethiopia, December 2014.
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Enrique Lopez-Tapia / Priest in traditional clothing outside Bet Giyorgis Church, a church carved out of solid tufa rock, Lalibela. UNESCO World Heritage Site. Ethiopia, December 2014.
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John Cancalosi / Tufa, a limestone rock, from Mono County, California, USA.
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Gavin Hellier / Hot Air Balloon flight over the famous Volcanic tufa rock formations around Goreme, Cappadocia, Anatolia, Turkey, 2008
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Gavin Hellier / Elevated view over the Volcanic tufa rock formations surrounding Goreme, Cappadocia, Anatolia, Turkey, 2008
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Gavin Hellier / Elevated view over the Volcanic tufa rock formations surrounding Goreme, Cappadocia, Anatolia, Turkey, 2008
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Gavin Hellier / Volcanic tufa formations, known as Fairy Chimneys, Pasabag, near Zelve, Cappadocia, Anatolia, Turkey, 2008
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Gavin Hellier / Volcanic tufa formations, known as Fairy Chimneys, near Goreme, Cappadocia, Anatolia, Turkey, 2008
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Gavin Hellier / Volcanic tufa formations, known as Fairy Chimneys, Pasabag, near Zelve, Cappadocia, Anatolia, Turkey, 2008
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Gavin Hellier / Aerial photograph of the Tufa rock formations and landscape near Goreme, Cappadocia, Anatolia, Turkey, 2008
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Gavin Hellier / Aerial photograph of the Tufa rock formations and landscape near Goreme, Cappadocia, Anatolia, Turkey, 2008
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Gavin Hellier / Aerial photograph of the Tufa rock formations and landscape including the Rock Church of St John the Baptist in Cavusin, Cappadocia, Anatolia, Turkey, 2008
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Gavin Hellier / Hot Air Balloon with the Worlds largest passenger basket just above the tufa rock formations near Goreme, Cappadocia, Anatolia, Turkey, 2008
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Gavin Hellier / Man tending his vineyard in front of Tufa rock formations in the Rose Valley near Goreme, Anatolia, Turkey, 2008
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Marie Read / Wilson's Phalaropes (Phalaropus tricolor) large flock swimming/foraging near the shoreline at Mono Lake, tufa formations in the background, late July, Mono Lake, California, USA. July.
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Marie Read / Wilson's Phalarope (Phalaropus tricolor), female in breeding plumage, stretching its wing and foot, perched on small tufa outcrop in the water, Mono Lake, California, USA, July.
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Marie Read / Wilson's Phalaropes (Phalaropus tricolor), flock resting on partly-submerged tufa formation Mono Lake, California, USA, July.
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Marie Read / Wilson's Phalaropes (Phalaropus tricolor) group on low tufa outcrop at Mono Lake California, Sierra Nevada in background, USA, July.
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Marie Read / Wilson's Phalaropes (Phalaropus tricolor), flock flying over tufa formations at Mono Lake, just after sunrise, California, USA.
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Marie Read / Wilson's Phalaropes (Phalaropus tricolor) large flock swimming/in flight near the shoreline at Mono Lake, tufa formations in the background, late July, Mono Lake, California, USA. July.
