Chalk Photograph - Chalk Dust by Dennis Kunkel Microscopy/science Photo Library

Chalk Dust is a photograph by Dennis Kunkel Microscopy/science Photo Library which was uploaded on September 15th, 2018.

Chalk Dust

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

by Dennis Kunkel Microscopy/science Photo Library

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Title

Chalk Dust

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 15th, 2018