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Lithic Hapludoll (coarse-loamy, siliceous, active, hyperthermic)

This profile was photographed in São Paulo state Brazil SA. The soil is formed over calcareous sandstone at the edge, shoulder position below a plateau covered with Oxisols formed in thick oxidized sediments. The lithic contact, seen in this photo at 50 cm is at the limit of the Lithic subgroup classification. Mollisols formed in base enriched sediments from the calcareous sandstone also dominate the side slopes directly below this site are thicker and classify as Typic Hapludolls and Typic Argiudolls. Base saturation in the soils formed in and from sediments derived from the calcareous sandstone range from 50 to 90%. In surrounding Oxisols base saturation percentages are mostly less than 10%. Although Mollisols are present in only a small portion of the area their presence of in an area dominated by Oxisols illustrates the significance of parent material properties in determining soil properties.

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Uploaded on November 2, 2010
Taken on September 20, 2010