Photo courtesy David Laird, USDA, ARS, National Soil Tilth Laboratory Ames IA. USA
Stereo image of large soil smectite quasicrystal on cellulose filter paper. (SSSAm. J. 55:1499-1504). Ap horizon, Webster soil, University of Minnesota Southern Agricultural Experiment Station, Waseca, MN.
From: Ap horizon, Webster soil, University of Minnesota Southern Agricultural Experiment Station, Waseca, MN.
Dimensions: Field of view approx. 90 microns wide
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