Chalk Dust #3 is a photograph by Dennis Kunkel Microscopy/science Photo Library which was uploaded on September 27th, 2018.
Chalk Dust #3
Coloured scanning electron micrograph (SEM) of Chalk dust (anti-dust type) from a school chalkboard eraser. Chalk (also known as calcite) is a white,... more
Title
Chalk Dust #3
Artist
Dennis Kunkel Microscopy/science Photo Library
Medium
Photograph
Description
Coloured scanning electron micrograph (SEM) of Chalk dust (anti-dust type) from a school chalkboard eraser. Chalk (also known as calcite) is a white, porous sedimentary rock. It is a form of limestone that is chemically called calcium carbonate (CaCO3). Limestone forms in deep marine environments from the slow accumulation of very small calcite plates (coccoliths) produced by certain types of microorganisms called coccolithophorids. The famous White Cliffs of Dover are an example of a natural limestone deposit. Magnification: x2,135 when shortest axis printed at 25 millimetres.
Uploaded
September 27th, 2018
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