{Introduction}{Physical Setting}{Methods}{Results}{Conclusions}{Future Study}{Aerial Photo}{Digital Elevation Map}

HOME

PIT#7

Group #7

  A1—0-65 cm; very dark brown (10YR 2/2), moist, loamy sand; weak medium sub-angular , .7 sphericity, poorly sorted, mostly quartz with feldspar and other crystalline lithologies; very friable, slightly-sticky, non-plastic; many fine roots (<3mm); no HCL reaction; clear smooth boundary.

 

  A2—65-90 cm; very dark brown (10 YR 2/2), moist, loamy sand; weak fine sub-angular blocky, .7 sphericity, poorly sorted, mostly quartz with feldspar and other crystalline lithologies; friable, slightly-sticky, non-plastic; many fine roots (<3mm); clasts:  0.5 to 3 cm, 5%, subangular, no orientation, basalt, granite, metamorphic lithology; no HCL reaction; clear smooth boundary.

 

  AB—90-120 cm; dark yellowish brown (10 YR 3/6 to 10 YR 4/6), moist, loamy sand; weak very fine sub-angular blocky, .7 sphericity, poorly sorted, mostly quartz with feldspar and other crystalline lithologies; loose; moderately few very fine roots; clasts:  2 to 4 cm, 10%, subangular, no orientation, basalt, granite, metamorphic lithology; no HCL reaction; clear smooth boundary.

 

  C—120-160+ cm; yellowish brown (10 YR 5/8), moist, gravelly sand; sand course to very course, .7 sphericity, poorly sorted, mostly quartz with feldspar and other crystalline lithologies; massive; loose; few very fine roots; clasts:  2-10 cm, 50%, subangular, no orientation, includes granite, basalt; no HCL reaction.

 
Pit Profile #7        

 

Conclusion

Soil Pit #7 is located on the backslope in a shady, weedy area, near a wooded setting.  Soils in this location are mapped as Finchford Series in new soil map data, and as Hubbard loamy sand, 6-12% slopes (HuC2), in the Dunn County Soil Survey (ref).  Our observations are generally consistent with the Finchford Series description.  However, there are discrepancies.  We observed the following characteristics not indicated in the Finchford Series description:  presence of an AB horizon, thicker horizons all around, the absence of a B-horizon, and the absence of vertical subdivisions in the C-horizon (C1 and C2). These relatively minor discrepancies lead us to conclude that the Soil Profile observed in Pit #7 is most consistent with the Hubbard Series as described in the Dunn County Soil Survey (ref).  Similarities between soil characteristics we observed in the Pit #7 soil profile and the Hubbard Series description include: thick and dark A-horizon, texture (loamy sand), structure (weak, subangular blocky), sandy parent material, vegetation (tree and shrub), slope (6-12%), and a very dark brown solum.