Dr. Axel Gebauer / Bacteria - iron and manganese oxidizers and their complementary reducers, in the mud of an empty fish pond, Upper Lusatia Heath and Pond Landscape, Upper Lusatia UNESCO Biosphere Reserve, Germany

Juergen Freund / Aerial of Sturt Stoney Desert with gibber rocks. Gibber rocks are millions of years wind and water weathered chalcedonised sandstone with a hardened crust of soil cemented silica, iron and manganese,...

Adrian Davies / Coloured film on water surface caused by chemoautotrophic bacteria that oxidise iron and manganese ions in the water. Thursley National Nature Reserve, Thursley, Surrey, England, UK. June.

Sylvain Cordier / Sandstone with oxidation (iron and manganese), Flores island, Indonesia

Sylvain Cordier / Sandstone with oxidation (iron, manganese), Pink rock, Flores island, Indonesia

Sylvain Cordier / Sandstone with oxidation (iron and manganese), Flores island, Indonesia

Sylvain Cordier / Sandstone with oxidation (iron and manganese) Flores island, Indonesia

Sylvain Cordier / Sandstone with oxidation (iron and manganese), Pink rock, Flores island, Indonesia

John Cancalosi / Polymetallic nodule, also called manganese nodule, rock concretions on the sea bottom formed of concentric layers of iron and manganese hydroxides around a core. Blake plateau, Atlantic

John Cancalosi / Rhodochrosite a manganese carbonate mineral with chemical composition MnCO3. In its (rare) pure form, it is typically a rose-red color, but impure specimens can be shades of pink to pale brown, Argent...

John Cancalosi / Polymetallic nodule, also called manganese nodule, rock concretion formed of concentric layers of iron and manganese hydroxides around a core. From Blake Plateau, Atlantic ocean, collected in 1970's.

Alex Hyde / Raft spider (Dolomedes fimbriatus) female on Heathland pool, Surrey, UK. October. The multicoloured film results from chemoautotrophic bacteria that oxidise iron and manganese ions in the water, with...

Alex Hyde / Heathland pool, Surrey, UK. October. The multicoloured film results from chemoautotrophic bacteria that oxidise iron and manganese ions in the water, with the colours being caused by thin film interfe...

John Cancalosi / Cross-section of a polymetalic deep sea nodule, rich in Manganese and Cobalt, from the Blake plateau (800m deep) off the coast of South Carolina, USA.

Dr. Axel Gebauer / Bacteria - iron and manganese oxidizers and their complementary reducers, in the mud of an empty fish pond, Upper Lusatia Heath and Pond Landscape, Upper Lusatia UNESCO Biosphere Reserve, Germany

Dr. Axel Gebauer / Bacteria - iron and manganese oxidizers and their complementary reducers, in the mud of an empty fish pond, Upper Lusatia Heath and Pond Landscape, Upper Lusatia UNESCO Biosphere Reserve, Germany

Dr. Axel Gebauer / Bacteria - iron and manganese oxidizers and their complementary reducers, in the mud of an empty fish pond, Upper Lusatia Heath and Pond Landscape, Upper Lusatia UNESCO Biosphere Reserve, Germany

Juergen Freund / Aerial of Sturt Stoney Desert with gibber rocks. Gibber rocks are millions of years wind and water weathered chalcedonised sandstone with a hardened crust of soil cemented silica, iron and manganese,...

Juergen Freund / Aerial of Sturt Stoney Desert with gibber rocks. Gibber rocks are millions of years wind and water weathered chalcedonised sandstone with a hardened crust of soil cemented silica, iron and manganese,...

Juergen Freund / Aerial of Sturt Stoney Desert with gibber rocks. Gibber rocks are millions of years wind and water weathered chalcedonised sandstone with a hardened crust of soil cemented silica, iron and manganese,...

Juergen Freund / Aerial of Sturt Stoney Desert with gibber rocks. Gibber rocks are millions of years wind and water weathered chalcedonised sandstone with a hardened crust of soil cemented silica, iron and manganese,...

Juergen Freund / Aerial of Sturt Stoney Desert with gibber rocks. Gibber rocks are millions of years wind and water weathered chalcedonised sandstone with a hardened crust of soil cemented silica, iron and manganese,...

Juergen Freund / Aerial of Sturt Stoney Desert with gibber rocks. Gibber rocks are millions of years wind and water weathered chalcedonised sandstone with a hardened crust of soil cemented silica, iron and manganese,...

Juergen Freund / Aerial of Sturt Stoney Desert with gibber rocks. Gibber rocks weathered chalcedonised sandstone with a hardened crust of soil cemented silica, iron and manganese, Australia. June 2011

Juergen Freund / Aerial of Sturt Stoney Desert with gibber rocks. Gibber rocks are millions of years wind and water weathered chalcedonised sandstone with a hardened crust of soil cemented silica, iron and manganese,...

John Cancalosi / Rhodochrosite (manganese carbonate) in a polished slice of stalactite. Argentina

Graham Eaton / Old Manganese Mine workings, and view of the Gwylan Islands at Porth Ysgo, Gwynedd, North Wales, UK, April 2010.

Graham Eaton / Old Manganese Mine workings at Porth Ysgo, Gwynedd, North Wales, UK, April 2010.

Graham Eaton / Old Manganese Mine workings at Porth Ysgo, Gwynedd, North Wales, UK, April 2010.

John Cancalosi / Rhodochrosite (Manganese carbonate mineral) polished slice of stalactite, Argentina

John Cancalosi / Rhodochrosite (Manganese carbonate mineral) on quartz crystal, Argentina

John Cancalosi / Fossil fish w/manganese dendrite (Leptolepides sprattiformis) GER Jurassic

Vivek Menon / Manganese mining in previous evergreen forest, Dandeli sanctuary, Karnataka, Southern India

John Cancalosi / Fossil fish, Leptolepides sprattiformis, with manganese dendrites Germany, Jurassic period

Luiz Claudio Marigo / Deforestation of tropical rainforest for Manganese ore mining, Carajas, Para, Brazil

John Cancalosi / Hausmannite on Garnet (Andradite), a manganese ore. Sample from South Africa, N'Chwaning Mines, South Africa.

John Cancalosi / Calcite (CaCO3), one of the most common and variable minerals on earth, used in building, metallugy, fertilizers, chemical industry, rhodochrosite, MnCO3, manganese carbonate, an ore of manganese when...

John Cancalosi / Franklinite an ore of zinc, manganese and iron. Sample from Sterling Hill Mine, Ogdensburg, New Jersey, USA.

John Cancalosi / Tantalite, an iron manganese tantalum niobium oxide, The most widespread tantium mineral, Tantalite is an ore of tantalum, Tantalum is an industrially useful metal. Sample from Alto Quixaba Pegmatite,...

John Cancalosi / Rhodochrosite (MnCO3), an ore of manganese. Cross-section of a stalactite. Argentina

John Cancalosi / Franklinite (ZnFe2O4, zinc manganese iron oxide) was an important ore of zinc until mines around Franklin New Jersey closed. Found only around Franklin New Jersey. Sterling Hill Mine, Ogdensburg, New...

Nigel Cattlin / Dark, necrotic spots on Barley (Hordeum vulgare) leaves, a symptom of manganese deficiency, England, UK.

Nigel Cattlin / Interveinal chlorosis a symptom of manganese deficiency on an apple leaf

Nigel Cattlin / Interveinal leaf necrosis caused by manganese (Mn) deficiency in Pinot Noir grapes in the Champagne Region of France

Nigel Cattlin / Necrotic lesions and damage on the margin of a Pinot Noir grapevine leaf caused by manganese deficiency, Champagne, France

Philippe Clement / Spessartine, nesosilicate, manganese aluminium garnet species against white background

Philippe Clement / Strunzite, phosphate triclinic-pinacoidal mineral containing hydrogen, iron, manganese, oxygen, and phosphorus against white background