Light micrograph of Actinoptychus heliopelta,a centric diatom forming a division of the algae family. Diatoms are microscopic unicellular organisms that ocur abundantly in marine & freshwater plankton. They form the basis of the food chain. The body is composed of two halves,which fit together like a tiny pill box. The cell walls contain silica,which is preserved in deposits known as siliceous or diatomaceous earths (ooze). Once hardened into rock it is called diatomite. The high porosity of this rock enables it to be used for filters,fillers & as a mild abrasive | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Grave, Eric |
Taille de l’image : | 5122 px × 3462 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |