The morphology of pyrite and its oxidation products were studied in thin sections with the scanning electron microscope. Secondary pyrite is frequently present as framboids. The crystals comprising the framboids are pyritohedral or octahedral. Pseudomorphic alteration of the framboids to jarosite is not present in this profile. The jarosite crystallizes from the soil solution and is present in voids. The jarosite crystals are pseudocubic or tabular. Amorphous iron hydroxides and goethite are the other neoformations in the soil. These are confined to the surface horizon, in the aerated part of the profile.

 

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