Deep-sea sedimentary record of the late Wisconsin cataclysmic floods from the Columbia River

Brunner, Charlotte A; Normark, William R.; Zuffa, Gian Gaspare; Serra, Francesca

doi:10.1130/0091-7613(1999)027<0463:dssrot>2.3.co;2

Cited by 57 publications

(37 citation statements)

References 1 publication

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“…Additionally planktonic δ 18 O seawater records enable the possible detection of isotopically light meltwater discharge. Evidence for meltwater pulses into the Pacific Ocean from the CIS have proven elusive, even though large glacial lake outburst floods from proglacial Lake Missoula emptied into the North Pacific via the Columbia River (Brunner et al, 1999;Lopes and Mix, 2009;Normark and Reid, 2003). However recent studies in the North Pacific have found δ 18 O anomalies suggestive of CIS meltwater input into the Gulf of Alaska during the late deglacial (Davies et al, 2011).…”

Section: Introductionmentioning

confidence: 95%

Deglacial ocean warming and marine margin retreat of the Cordilleran Ice Sheet in the North Pacific Ocean

Taylor

Hendy

Pak

2014

Earth and Planetary Science Letters

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Section: Introductionmentioning

confidence: 95%

Deglacial ocean warming and marine margin retreat of the Cordilleran Ice Sheet in the North Pacific Ocean

Taylor

Hendy

Pak

2014

Earth and Planetary Science Letters

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“…Baker et al (2010-this issue) attribute the lower 45 m of the borehole drilled at the mouth of the Columbia River to deposition from these floods. Drilling in the Escanaba Trough, 800 km from the present mouth of the Columbia River recovered Missoula flood deposits as well (Brunner et al, 1999). Thus we suggest that the deeper clinoform unit is the shelf record of these floods.…”

Section: Evidence For Varied Sedimentation Rates Through the Holocenementioning

confidence: 97%

“…Although the Missoula floods were spectacular, the volume deposited on the shelf was modest in comparison to the total shelf volume. At this time large volumes of sediment bypassed the shelf and were deposited in the deep sea (Brunner et al, 1999) probably due to limited accommodation space on the shelf. Prior to 4000 yr BP, shelf sedimentation appears to have been highest during the middle part of the Holocene; whether it is tied to the period of increased sediment accumulation rates in the lower Columbia River estuary or a period of increased sediment bypass through the lower estuary (Baker et al, 2010-this issue) will await a drill hole on the shelf.…”

Section: Evidence For Varied Sedimentation Rates Through the Holocenementioning

confidence: 99%

Partitioning of sediment on the shelf offshore of the Columbia River littoral cell

2010

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. Seismic-reflection, sidescan sonar, and surface sediment data show that the shelf deposit is not uniform in distribution or composition. The shelf deposit is 15-50 m thick off the beaches of the southern part of the study area but is less than 3 m thick, and, in places, absent from the inner shelf in the northern third of the study area. Surface sediment texture of the shelf deposit varies as well. Pleistocene-age gravel covers parts of the inner shelf in the northern third of the area. To the south, the surface of the Holocene shelf deposit is composed of fine sand near shore that grades offshore to dominantly very fine sand in 25-30 m water depth and muddy sand on the middle and outer shelf (N 50 m depth). Although a huge volume of sediment covers the shelf, its uneven distribution indicates that in places only small amounts are available as a potential offshore source to the adjacent beaches, and in other places the finer-grained nature of the shelf deposit indicates that significant winnowing of fine sediment would be necessary to make it compositionally equivalent to sediment on adjacent beaches.Published by Elsevier B.V.

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“…Waitt (1985) advocated the time period for repeated drainage from glacial lake Missoula to be between 15 300 and 12 700 14 C yr BP, but it was found recently that flooding occurred earlier than 15 500 14 C yr BP (Brunner et al, 1999).…”

Section: Previous Work and Quaternary Historymentioning

confidence: 99%

Glacial imprints of the Okanogan Lobe, southern margin of the Cordilleran Ice Sheet

Kovanen

Slaymaker

2004

J Quaternary Science

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The glacial geomorphology of the Waterville Plateau (ca. 55 km 2 ) provides information on the dynamics of the Okanogan Lobe, southern sector of the Cordilleran Ice Sheet in north-central Washington. The Okanogan Lobe had a profound influence on the landscape. It diverted meltwater and floodwater along the ice front contributing to the Channeled Scabland features during the late Wisconsin (Fraser Glaciation). The glacial imprint may record surge behaviour of the former Okanogan Lobe based on a comparison with other glacial landsystems. Conditions that may have promoted instability include regional topographic constraints, ice marginal lakes and dynamics of the subglacial hydrological system, which probably included a subglacial reservoir. The ice-surface morphology and estimated driving stresses (17-26 kPa) implied from ice thickness and surface slope reconstructed in the terminal area also suggest fast basal flow characteristics. This work identifies the location of a fast flowing ice corridor and this probably affected the stability and mass balance of the south-central portion of the Cordilleran Ice Sheet. Evidence for fast ice flow is lacking in the main Okanogan River Valley, probably because it was destroyed during deglaciation by various glacial and fluvial processes. The only signature of fast ice flow left is the imprint on the Waterville Plateau.

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Deep-sea sedimentary record of the late Wisconsin cataclysmic floods from the Columbia River

Cited by 57 publications

References 1 publication

Deglacial ocean warming and marine margin retreat of the Cordilleran Ice Sheet in the North Pacific Ocean

Deglacial ocean warming and marine margin retreat of the Cordilleran Ice Sheet in the North Pacific Ocean

Partitioning of sediment on the shelf offshore of the Columbia River littoral cell

Glacial imprints of the Okanogan Lobe, southern margin of the Cordilleran Ice Sheet

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