Geologic Map of the Poverty Bay 7.5' quadrangle, King and Pierce counties, Washington

Booth, Derek B.; Waldron, Howard Hamilton; Troost, Kathy Goetz

doi:10.3133/sim2854

Cited by 2 publications

(2 citation statements)

References 12 publications

(26 reference statements)

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“…Stagnation of the marginal zone of the retreating Puget lobe is also consistent with the widespread occurrence of kame-kettle topography (e.g., Haugerud, 2009) and ice-contact deposits (e.g., Troost et al, 2005;Polenz et al, 2014;Booth et al, 2004b) that are distinctly not arranged in end-moraine-like bands.…”

Section: Stagnation Of the Puget Lobe Marginsupporting

confidence: 69%

Deglaciation of the Puget Lowland, Washington

Haugerud¹

2021

Untangling the Quaternary Period—A Legacy of Stephen C. Porter

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Recently obtained radiocarbon ages from the southern Puget Lowland and reevaluation of limiting ages from the Olympic Peninsula in the light of new light detection and ranging (LiDAR) data suggest that the Juan de Fuca and Puget lobes of the Cordilleran ice sheet reached their maximum extents after 16,000 calibrated yr B.P. Source areas for both lobes fed through a common conduit, likely requiring that downstream responses to changes in either source area were similar. Dates for ice-sheet retreat are sparse and contradictory, but they suggest that retreat was rapid. Depositional and geomorphic evidence shows that retreat of the Juan de Fuca lobe predated retreat of the Puget lobe. No recessional end moraines have been identified in the Puget Lowland, in contrast to numerous recessional end moraines constructed by the Okanogan lobe east of the Cascade Range, and in contrast to later ice-sheet retreat in western Whatcom County north of the Puget Lowland. These observations lead to the hypothesis that collapse of the Juan de Fuca lobe, hastened by the instability of a marine-based ice sheet, steepened the ice-sheet surface over the eastern Strait of Juan de Fuca and diverted ice flow upstream of the Puget lobe to the west. Starved of ice, the Puget lobe retreated quickly.

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Section: Stagnation Of the Puget Lobe Marginsupporting

confidence: 69%

Deglaciation of the Puget Lowland, Washington

Haugerud¹

2021

Untangling the Quaternary Period—A Legacy of Stephen C. Porter

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“…Rainier. Geologic deposits in the affected 15 to 30 feet (4.5 to 9.1 m) deep aquifer (Figure , Table ) are Holocene alluvial sands and silty sands, of andesitic and pyroclastic parent rock origin (Booth et al ; Troost ), which generally coarsen downward and are underlain by a clayey silt aquitard. The alluvial deposits are interbedded with peat in some areas; other areas contain coarser organic debris (including intact logs associated with reworked lahar deposits).…”

Section: Methodsmentioning

confidence: 99%

Arsenic Remediation Field Study Using a Sulfate Reduction and Zero‐Valent Iron PRB

Beaulieu¹,

Ramirez²

2013

Groundwater Monitoring Rem

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Toxic and carcinogenic effects of arsenic in drinking water continue to impact people throughout the world and arsenic remains common in groundwater at cleanup sites and in areas with natural sources. Advances in groundwater remediation are needed to attain the low concentrations that are protective of human health and the environment. In this article, we present the successful use of a permeable reactive barrier (PRB) utilizing sulfate reduction coupled with zero‐valent iron (ZVI) to remediate the leading edge of a dissolved arsenic plume in a wetland area near Tacoma, Washington. A commercially available product (EHC‐M®, Adventus Americas Inc., Freeport, Illinois) that contains ZVI, organic carbon substrate, and sulfate was injected into a reducing, low‐seepage‐velocity aquifer elevated in dissolved arsenic and iron from a nearby, slag‐containing landfill. Removal effectiveness was strongly correlated with sulfate concentration, and was coincident with temporary redox potential (Eh) reductions, consistent with arsenic removal by iron sulfide precipitation. The PRB demonstrates that induced sulfate reduction and ZVI are capable of attaining a regulatory limit of 5 µg/L total arsenic, capturing of 97% of the arsenic entering the PRB, and sustaining decreased arsenic concentrations for approximately 2 years, suggesting that the technology is appropriate for consideration at other sites with similar hydrogeochemical conditions. The results indicate the importance of delivery and longevity of minimum sulfate concentrations and of maintaining sufficient dissolved organic carbon and/or microscale ZVI to precipitate FeS, a precursor phase to arsenic‐bearing pyrite that may provide a stable, long‐term sink for arsenic.

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Geologic Map of the Poverty Bay 7.5' quadrangle, King and Pierce counties, Washington

Cited by 2 publications

References 12 publications

Deglaciation of the Puget Lowland, Washington

Deglaciation of the Puget Lowland, Washington

Arsenic Remediation Field Study Using a Sulfate Reduction and Zero‐Valent Iron PRB

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