National Water-Quality Assessment (NAWQA) Program
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Transport and Fate of Nitrate in a Glacial Outwash Aquifer in Relation to Ground-Water Age, Land Use Practices and Redox Processes
By Larry J. Puckett and Timothy K. Cowdery
[Journal of Environmental Quality, vol. 31, no. 3, p. 782-796 ]Table 1. Bulk and <1 mm fraction mineralogy of sediment samples collected at various depths from sites 1 and 3.
Site |
Depth (m) |
Location |
Bulk fraction† |
<1 mm fraction |
Total C (%) |
Organic C (%) |
Inorganic C (%) |
OF1 |
1.5 |
Top OF1S |
qtz, plag, cal. |
NA |
1.49 |
0.74 |
0.76 |
OF1 |
3.0 |
Bottom OF1S |
qtz, plag, cal., dol. |
NA |
1.19 |
0.3 |
0.89 |
OF1 |
4.6 |
Thin organic layer |
qtz, plag, dol., cal. |
smect., illite, kaol., chlor., dol., cal., feld.,
horn., qtz. |
3.17 |
1.45 |
1.71 |
OF1 |
12.2 |
Top OF1D |
qtz, plag, kspar, dol.,cal. |
smect., illite, kaol., chlor., dol., cal., feld.,
horn., qtz. |
1.11 |
0.21 |
0.9 |
OF3 |
1.5 |
Unsat. Zone |
qtz, kspar, plag,
dol.,cal. |
smect., illite, kaol., chlor., dol., cal., feld.,
horn., qtz. |
0.06 |
0.02 |
0.05 |
OF3 |
6.1 |
OF3S |
qtz, kspar, plag, dol.,cal. |
NA |
0.84 |
0.04 |
0.8 |
OF3 |
11.6 |
Top clay lens below OF3M |
qtz, plag, kspar, dol., cal. |
smect., illite, kaol., chlor., dol., cal., feld.,
horn., qtz. |
0.89 |
0.09 |
0.81 |
OF3 |
18.3 |
OF3D |
plag, qtz, dol., cal. |
NA |
0.89 |
0.01 |
0.88 |
†qtz=quartz; plag=plagioclase; kspar=potassium feldspar; cal.=calcite; dol.=dolomite; smect.=smectite; kaol=kaolinite; chlor=chlorite; feld=feldspar; horn.=hornblend
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