Geologic and Wireline Summaries from Fiscal Year 2002 ILAW Boreholes

Reidel, Steve P.; Ho, Anita M.

doi:10.2172/15010319

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…Note that in E24-21 the lower magnetic reversal of the normal polarity zone coincides with what has been interpreted as a weak paleosol (for data on Cold Creek bar paleosols see Reidel and Ho, 2002). The upper boundary of the normal zone probably also coincides with a paleosol since reversed polarity is found above the paleosol horizon in E17-23, while in E24-21 normal polarity is found below the paleosol.…”

Section: Eastern Cold Creek Barmentioning

confidence: 56%

“…A putative paleosol not coinciding with a polarity reversal is encountered in five out of six of these cores at about 21.3 (70 ft.) below ground surface. This paleosol has been used to correlate between drill cores in the southern part of this cross-section (Reidel and Ho, 2002) as indicated in Figure 8. We see little evidence for a reversedto-normal polarity change, corresponding to the transition to the present normal field, near the tops of these drill cores.…”

Section: Eastern Cold Creek Barmentioning

confidence: 99%

“…interglacial intervals before and after are characterized by depositional hiatuses and pedogenesis at the study area. If this can be generalized to the entire Hanford formation, the majority of the time spanned by the section is represented by depositional hiatuses and the candidate paleosols of Reidel and Ho (2002), while the majority of the section was deposited during very short periods with high deposition rates. The correspondence of the polarity boundaries with the putative paleosols is thus not surprising.…”

Section: Paleoclimatic Interpretation Of Eastern Cold Creek Barmentioning

confidence: 99%

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Magnetostratigraphic evidence from the Cold Creek bar for onset of ice-age cataclysmic floods in eastern Washington during the early pleistocene

et al. 2006

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This study provides a detailed magnetostratigraphy of sediments composing the Cold Creek cataclysmic flood bar in the Pasco Basin, Washington. Our interpretation suggests onset of Missoula floods or similar events prior to 1.1 myr, later than previously suggested by Bjornstad et al. [Bjornstad, B.N., Fecht, K.R., Pluhar, C.J., 2001. Long history of pre-Wisconsin, Ice Age cataclysmic floods: evidence from southeastern Washington State. Journal of Geology 109 (6), 695–713]. Nonetheless these data suggest that Channeled Scabland features formed over a much longer timespan than commonly cited, that continental ice sheets of the early Pleistocene reached as far south as those of the late Pleistocene, and that similar physiography existed in eastern Washington and perhaps Montana to both generate and route Missoula-flood-like events. This study adds paleomagnetic polarity results from 213 new samples of silts and sands derived from nine new drill cores penetrating the Cold Creek cataclysmic flood bar to our previous database of 53 samples from four boreholes, resulting in a much more robust and detailed magnetostratigraphy. Rock magnetic studies on these sediments show pure magnetite to be the predominant remanence-carrying magnetic mineral, ruling out widespread remagnetization by secondary mineralization. The magnetostratigraphy at eastern Cold Creek bar is characterized by a normal polarity interval bracketed by reversed polarities. Equating the normal zone with the Jaramillo subchron (0.99–1.07 myr) affords the simplest correlation to the magnetic polarity timescale. Western Cold Creek bar was likely deposited during the Brunhes chron (0–0.78 myr) since it exhibits mainly normal polarities with only two thin reversed-polarity horizons that we interpret as magnetic excursions during the Brunhes.

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Section: Eastern Cold Creek Barmentioning

confidence: 56%

Section: Eastern Cold Creek Barmentioning

confidence: 99%

Section: Paleoclimatic Interpretation Of Eastern Cold Creek Barmentioning

confidence: 99%

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Magnetostratigraphic evidence from the Cold Creek bar for onset of ice-age cataclysmic floods in eastern Washington during the early pleistocene

et al. 2006

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“…Appendix A provides the hydrostratigraphic column for each geographic area, including the layer thicknesses and their hydraulic and geochemical property designations. A A_BC A_BT A_ILAW Lindsey et al 1992b;Reidel and Horton 1999;Valenta et al 2000;Reidel et al 2001;Reidel and Ho 2002;Tallman et al 1979;Wurstner et al 1995 S 200…”

Section: Hydrostratigraphymentioning

confidence: 99%

Vadose Zone Hydrogeology Data Package for the 2004 Composite Analysis

Freeman¹,

Cantrell²,

Fayer³

et al. 2004

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Vadose Zone Hydrogeology Data Package for Hanford Assessments

Freeman¹,

Cantrell²,

Fayer³

et al. 2006

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This data package was originally prepared to support a 2004 composite analysis (CA) of low-level waste disposal at the Hanford Site. The Technical Scope and Approach for the 2004 Composite Analysis of Low-Level Waste Disposal at the Hanford Site (Kincaid et al. 2004) identified the requirements for that analysis and served as the basis for the data collection effort documented in this data package. Completion of the 2004 CA was later deferred, and the 2004 Annual Status Report for the Composite Analysis of Low-Level Waste Disposal in the Central Plateau at the Hanford Site (DOE 2005) indicated that a comprehensive update to the CA was in preparation and would be submitted in 2006. However, the U.S. Department of Energy (DOE) has recently decided to further defer the CA update and will use the cumulative assessment currently under preparation for the environmental impact statement (EIS) being prepared for tank closure and other site decisions as the updated CA.

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Geologic and Wireline Summaries from Fiscal Year 2002 ILAW Boreholes

Abstract: Four boreholes were drilled at the Immobilized Low-Activity Waste Disposal Site in April 2002. Three were completed as groundwater monitoring wells. This report documents the drilling and data collected from the drilling.

Cited by 3 publications

References 5 publications

Magnetostratigraphic evidence from the Cold Creek bar for onset of ice-age cataclysmic floods in eastern Washington during the early pleistocene

Magnetostratigraphic evidence from the Cold Creek bar for onset of ice-age cataclysmic floods in eastern Washington during the early pleistocene

Vadose Zone Hydrogeology Data Package for the 2004 Composite Analysis

Vadose Zone Hydrogeology Data Package for Hanford Assessments

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