Diatom
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A diatom is any member of a large group comprising several genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world. Living diatoms make up a significant portion
Diatoms through the microscope
Selections from Ernst Haeckel's 1904 Kunstformen der Natur (Art Forms of Nature), showing pennate (left) and centric (right) frustules.
Light microscopy of a living diatom. Numbered graduations are 10 micrometres apart
Chaetoceros willei Gran, 1897
Diatomaceous earth
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Diatomaceous earth, also known as diatomite, celite, or kieselgur, is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder. It has a parti
Diatom
…The shells of dead diatoms are a significant component of marine sediment, and the entire Amazon basin is fertilized annually by 27 million tons of diatom shell dust transported by transatlantic winds from the African Sahara, much of it from the Bodélé Depression, which was once made up of a system of fresh-water…
Diatomite rock sample from the Sisquoc Formation
Scanning electron micrograph of diatomaceous earth
c. 1900–1910 Diatomaceous earth pit at Neuohe
c. 1900–1910 a drying area: One firing pile is being prepared; another is under way.