IMAGES OF CLAY
| Smectite - soil | |
| Ap horizon, Webster soil, University of Minnesota Southern Agricultural Experiment Station, Waseca, MN. |
 Soil smectite quasicrystal on aluminium foil. (SSSAm. J. 55:1499-1504). |
| Field of view approx. 90 microns wide | |
| Photo courtesy David Laird, USDA, ARS, National Soil Tilth Laboratory Ames IA. USA. |
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| 712 x 534 pixel .jpg file (92 KB) - opens in a new window |
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