Center For Transportation Research
Table 24. Profile Description of Soils Occurring at Site 40HK5.
Table 25 shows the soil profile described on the site (at 959 N, 1005.4-1005.5 E). The Ap, A1, and A2 horizons were 62 cm in thickness. This resulted from continued deposition during recent or late Holocene times. The strong argillic with reddish color and thick clay skins indicate a long period of weathering. From the peoologic features alone, this soil is estimated to be early Holocene or more likely Pleistocene in age.
Table 25. Profile Description of Soils Occurring at Site 40HK6.
The soils in the study area have been mapped as Minvale, Talbott-Rock Outcrop, Talbott, or Hamblen series (Moore et al. 1979). Minvale series soils are located on benches, foot slopes, and fans, have developed on material derived from cherty limestone, and have strong argillic horizons. The Talbott and related series are developed on limestone residuum. The Hamblen series occurs on bottom lands and is developed on alluvium derived from limestone, shale, or siltstone.
Tables 26-33 give the profile descriptions of soils occurring at 40HK7. The textures of the soils were mainly silt loams in the surface and silty clay loam to silty clay in subsoils. The strong argillic horizons in the old alluvium indicate a long period of weathering for these soils. Some coarse chert was found in Profiles 2 (near the limestone bedrock), 4, 5, and 7 (at the contact between alluvium and residuum). The soils developed on alluvium were mainly somewhat poorly to poorly drained. The argillic horizons (Btg) were grayish and the water tables were high. Profile 1, for example, had the water table at 105 cm at the time of the sampling. Mottling commonly occurred at 30-50 cm. Soils developed on limestone residuum were well drained and lacked the mottling or graying of the soils developed in alluvium.
Table 26. Profile Description of Soils Occurring at Site 40HK7, Deep Test 1, 1006 N, 1020 E.
Table 27. Profile Description of Soils Occurring at Site 40HK7, Deep Test 2, 1006 N, 1010 B.
Table 28. Profile Description of Soils Occurring at Site 40HK7, Deep Test 3, 1056 N, 1045 B.
Table 29. Profile Description of Soils Occurring at Site 40HK7, Deep Test 4, 1076 N, 1050 E.
Table 30. Profile Description of Soils Occurring at Site 40HK7, Deep Test 5, 1105 N, 1070 E.
Table 31. Profile Description of Soils Occurring at Site 40HK7, Deep Test 6, 1105 N, 1045 E.
Table 32. Profile Description of Soils Occurring at Site 40HK7, Deep Test 7, 1095 N, 1025 E.
Table 33. Profile Description of Soils Occurring at Site 40HK7, Deep Test 8, 1086 N, 1015 E.
Horizonation of the soils developed on alluvium showed an Ap developed on recent sediment and that an underlying A or Ap which was probably the original surface prior to the extensive agricultural erosion. Underlying the A horizons, a transitional (BE) horizon occurs and then a well-developed argillic (Btg) horizon that was usually gray and silty clay in texture.
Soils developed on limestone bedrock had the characteristic red colors (5YR), strong argillic, and generally well drained conditions. The limestone-derived soils occurred on the higher elevations of the site (e.g., Profile 8).
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This page was last updated on 20 Jan 2002.