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Stratigraphy and Hydrology of the Jackson-Frazier Wetland, Oregon

^a Pacific Northwest Research Station, USDA Forest Service, 2770 Sherwood Lane, Suite 2A, Juneau, AK 99801 USA
^b Dep. of Crop and Soil Science, Oregon State Univ., Corvallis, OR, 97331 USA
^c Dep. of Geosciences, Oregon State Univ., Corvallis, OR 97331 USA

View larger version (26K): [in a new window]   Fig. 1 General location of Jackson-Frazier wetland and locations of monitoring sites, mineralogy sample sites, and stratigraphic transect

View larger version (41K): [in a new window]   Fig. 2 Southeast (A) to northwest (A') stratigraphic transect in Jackson-Frazier wetland developed with data from Sites 48, 85, 129, and 109

View larger version (42K): [in a new window]   Fig. 3 X-ray diffraction patterns from <2-µm, Mg-glycol treated clay at 50-, 100-, and 180-cm depths at auger sample Sites 109, 129, 48, and 85. 1 = Mg dismectite-glycol, 2 = di-vermiculite, 3 = illite, 4 = dehydrated halloysite, 5 = Mg-chlorite, 6 = kaolinite

View larger version (37K): [in a new window]   Fig. 4 Irish Bend x-ray diffraction patterns: (a) sample from Jackson-Frazier Site 48 at 180 cm (upper pattern) compared with a sample from the Irish Bend type section at Irish Bend, OR (lower pattern), (b) sample from the Irish Bend type section at Irish Bend, Oregon (upper pattern), compared with a sample from the Calapooyia river near Turner, OR (lower pattern). 1 = Mg-dismectite-glycol, 2 = di-vermiculite, 3 = illite, 5 = Mg-chlorite, 6 = kaolinite, 7 = albite

View larger version (23K): [in a new window]   Fig. 5 Comparison of Malpass x-ray diffraction patterns. Sample from presumed Malpass deposit at Jackson-Frazier wetland (upper pattern) and Malpass sample from Corvallis airport (lower pattern). 1 = Mg-dismectite-glycol, 2 = di-vermiculite, 3 = illite, 5 = Mg-chlorite, 6 = kaolinite

View larger version (34K): [in a new window]   Fig. 6 Precipitation (bottom) and water table data (top) as observed in piezometers at Jackson-Frazier Site 1