Glacial tills

The same is true of the geographical distribution of the uranium concentration in glacial till, the most common soil type in Finland (Geological Survey of Finland, 1985). The sometimes very large effect of ground permeability is the main reason that the details of the radon concentration distribution differ from the distribution of other radiation parameters. 

Figure 7.9. Effect of drying temperature on the analysis of a Brookston silty loam developed from glacial till and eolian silt, kg/ha is kilogram per hectare and ppm is parts per million (selected data adapted from Molloy and Lockman [12]).

The site is situated on a glacial outwash plain, and surface deposits consist of fill and undisturbed gravel and sand outwash containing minor silt and peat. Underlying the outwash at a depth of 20 or more feet is glacial till. Groundwater occurs under water table conditions within the highly permeable outwash deposits at a depth of 8 to 12 ft across the site. 

Case Study Glacial Tills from Thompson... 

Porphyry Copper Indicator Minerals (PCIMs) in glacial till samples from the giant Pebble porphyry Cu-Au-Mo deposit exploration significance... 

The glacial till deposits consist of poorly sorted to unsorted, nonstratified till ranging from muddy gravel to sandy coarse gravel. Pebbles and small cobbles are dominant. Surface morphology commonly includes morainal ridges, dry and water-filled kettle depressions, and meltwater channels (Hamilton 2007). 

Glacial till deposits Till sample site... 

QUIGLEY (R.M.) and MARTIN (R.T.), 1963. Chloritized weathering products of a New England glacial till. Clays and Clay Min. 10, 107-16. 

USA Illinois Mahomet Aquifer (glacial till, sand, and gravel) 3-16 Kirk et al. (2004)... 

Figure 6.4. Variation of organic carbon density with texture, in surface soils developed on glacial till and loess in Iowa. Soils with more loess have finer texture [data are from Brown (1936), as reported in Jenny (1941)].

Soil samples were collected from the Gardsjon catchment, located at 58° 04 N and 12° 03 E on the west coast of Sweden. The area is covered by coniferous forest with Norway spruce (Picea abies (L.) Karst), which dominate the landscape. The area is glacial till, silt loam soil that is fairly thin. The soil is classified as a spodosol haplorthod, common in Sweden (Nilsson, 1988). A detailed description of the geology, soils, and vegetation of the Gardsjon catchment is given by Olsson et al. (1985). 

Hinton M. J., Schiff S. L., and English M. C. (1994) Examining the contributions of glacial till water to storm runoff using two-and three-component hydrograph separations. Water Resour. Res. 30, 983-993. 

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