University of Idaho College of Agricultural and Life Sciences Plant, Soil & Entomological Sciences Soil & Land Resources
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Vertisols

(SSSA Marbut Memorial Slide Set)
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2. Udic Haplustert
Puerto Rico

This soil is formed in valley fill derived from limestone and pyroclastic material. Due to the high percentage of shrink-swell clays, Vertisols undergo continuous cycles of mixing, or argillipedoturbation. Note the lack of distinct horizonation in the upper profile as evidence of active churning.

(black and white divisions on scale each represent 6" or 15 cm)
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  Examples:
1. Typic Hapludert
Texas
2. Udic Haplustert
Puerto Rico
3. Udic Haplustert
southcentral Texas
4. Epiaquert landscape
southern Idaho
5. Xeric Epiaquert
southern Idaho
6. surface cracks in Vertisol
Utah
7. Vertisol slickensides
8. cracked wall on Vertisol
9. gilgai pattern
South Dakota
10. gilgai pattern
Texas
If you have any comments, suggestions, or questions about the 12 Soil Orders web site,
please contact Dr. Paul McDaniel  at the Soil Science Division,
University of Idaho, Moscow, ID 83844-2339.