Stromatolite, SEM

Credit: EYE OF SCIENCE/SCIENCE PHOTO LIBRARY

Caption: Stromatolite, coloured scanning electron micrograph (SEM). Stromatolites are mineralised microbial communities, formed from cyanobacteria (formerly known as blue-green algae). They are formed over thousands of years as the cyanobacteria trap detritus and sediment, forming large living rafts known as microbial mats. The cyanobacteria also secrete calcium carbonate, which causes the mats to mineralise, forming rock-like structures. Sample taken from Lake Thetis, Western Australia. Magnification: x6650 when printed at 10 centimetres wide.

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Keywords: alga, algae, algal, australian, biological, biology, blue-green, blue-green algae, botany, colonial, colonies, colony, coloured, cyanobacteria, false-coloured, fossils, lake, living fossil, microbial mat, microbiological, microbiology, mineralised, nature, plant, scanning electron micrograph, scanning electron microscope, sem, stromatolite, thetis, western australia

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