Facies of Late Pleistocene Glacial-Marine Sediments on Whidbey Island, Washington: An Isostatic Glacial-Marine Sequence

Domack, Eugene W.

doi:10.1007/978-1-4613-3793-5_13

Cited by 50 publications

(55 citation statements)

References 7 publications

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“…2). The Prince Albert Formation was deposited as syn-to post-glacial suspension fall-out and flocculation of fines from large inflows of sedimentladen water (Domack, 1983;Smith and Ashley, 1985), with some input by periodic turbidites and mud flows of semi-consolidated sediments (Tankard et al, 1982;Visser, 1991).…”

Section: Geological Settingmentioning

confidence: 99%

Depositional environments of the lower Permian Dwyka diamictite and Prince Albert shale inferred from the geochemistry of early diagenetic concretions, southwest Karoo Basin, South Africa

Herbert

Compton

2007

Sedimentary Geology

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The upper Dwyka and lower Ecca Groups in the Karoo Basin of South Africa document the climatic and palaeoenvironmental changes associated with the final Permo-Carboniferous deglaciation of the Gondwana supercontinent. The depositional environments of these groups have, until recently, been interpreted on the basis of sedimentological and palaeontological evidence. Here we use the geochemistry of early diagenetic concretions -septarian calcite concretions from the upper Dwyka Group and phosphatic chert concretions and beds from the lower Ecca Group -to infer the depositional environment of these rocks in the southwestern Karoo Basin. δ 18 O values (7.8 to 8.9‰ SMOW) suggest that the calcite concretions precipitated from a mixture of meteoric and glacial melt waters rather than Permian seawater. δ 13 C values (−15 to − 3‰ PDB) indicate that the carbon was derived from a mixture of craton-derived calcareous material and organic matter, bacterially degraded in the lower sulphatereduction to upper methanogenesis zones during early burial diagenesis. The rare-earth element (REE) patterns, Sr concentrations and 87 Sr/ 86 Sr ratios (0.716-0.737) significantly greater than Permian seawater (0.708), together also support the interpretation that calcite and phosphatic concretions formed in glacial, fresh water sediments.

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Section: Geological Settingmentioning

confidence: 99%

Depositional environments of the lower Permian Dwyka diamictite and Prince Albert shale inferred from the geochemistry of early diagenetic concretions, southwest Karoo Basin, South Africa

Herbert

Compton

2007

Sedimentary Geology

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“…Deglacial stratigraphic sequences similar to those described above are present in some coastal lowlands, although the sediments accumulated mainly in marine rather than lacustrine environments (Fyles, 1963;Armstrong, 1981;Domack, 1983;Clague, 1985). Diamicton, poorly sorted gravel, and sand deposited on the sea #oor adjacent to glacier termini grade laterally and vertically into silt and clay deposited farther from the ice front.…”

Section: Sedimentation During Glacier Retreatmentioning

confidence: 58%

Recognizing order in chaotic sequences of Quaternary sediments in the Canadian Cordillera

Clague¹

2000

Quaternary International

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Episodic growth and decay of the Cordilleran ice sheet during the Pleistocene has imposed order on Quaternary stratigraphies in British Columbia and southern Yukon Territory. Although Quaternary deposits in this region are inherently complex, thick valley and lowland "lls consist of discrete packages of glacial sediments separated by unconformities or by generally thin, patchy interglacial deposits. Some unconformities de"ne former valley and lowland landscapes of similar relief to the present. Each package of glacial sediments displays stratigraphic order: distinctive #uvial and lacustrine units, deposited during the early stage of a glaciation and later overridden and eroded by glaciers, are overlain by retreat phase and interglacial #uvial, lacustrine, and marine sediments. Packages of glacial sediments contain one or more unconformities produced by glacial erosion; commonly the unconformities are better stratigraphic markers than tills, which are not always present, especially in valleys. The Quaternary stratigraphic record in the Canadian Cordillera becomes less complete with age, owing to repeated erosion during both interglaciations and glaciations. The most complete glacial sequence is the youngest, deposited during the late Wisconsin Fraser Glaciation. Deposits of the penultimate glaciation are common but generally incomplete. Only sporadic remnants of older, apparently Middle and Early Pleistocene glacial deposits are present in the Cordillera.

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“…During that ϳ13.6-to 11-ka interval, the Everson interstade, glaciomarine drift accumulated over much of the northern Puget Lowland. Domack (1982Domack ( , 1983 and Dethier et al (1995) described several distinct sedimentary facies and environments for the Everson glaciomarine drift, ranging from proximal (near ice), relatively massive deposits to more distal, well stratified beds. Sections of Everson drift commonly fine upward, reflecting increasing distance from the calving ice front.…”

Section: Late Pleistocene Geologymentioning

confidence: 99%

“…Figure 4 shows a simplified map of the west wall. "Proximal" to "transitional" glaciomarine drift (Domack, 1982(Domack, , 1983Dethier et al, 1995), consisting of a generally massive, silty clay diamict with scattered pebbles, is the lowest and oldest unit (unit 1) exposed in the trench. Three 1-to 2-m-deep, 1-to 3-m-wide, steep-sided channels (labeled A, B, and C) are incised into the unit 1 diamict.…”

Section: Teeka Trenchmentioning

confidence: 99%

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Evidence for Late Holocene Earthquakes on the Utsalady Point Fault, Northern Puget Lowland, Washington

Johnson

Nelson

Personius

et al. 2004

Bulletin of the Seismological Society of America

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Trenches across the Utsalady Point fault in the northern Puget Lowland of Washington reveal evidence of at least one and probably two late Holocene earthquakes. The "Teeka" and "Duffers" trenches were located along a 1.4-km-long, 1-to 4-m-high, northwest-trending, southwest-facing, topographic scarp recognized from Airborne Laser Swath Mapping. Glaciomarine drift exposed in the trenches reveals evidence of about 95 to 150 cm of vertical and 200 to 220 cm of left

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Facies of Late Pleistocene Glacial-Marine Sediments on Whidbey Island, Washington: An Isostatic Glacial-Marine Sequence

Cited by 50 publications

References 7 publications

Depositional environments of the lower Permian Dwyka diamictite and Prince Albert shale inferred from the geochemistry of early diagenetic concretions, southwest Karoo Basin, South Africa

Depositional environments of the lower Permian Dwyka diamictite and Prince Albert shale inferred from the geochemistry of early diagenetic concretions, southwest Karoo Basin, South Africa

Recognizing order in chaotic sequences of Quaternary sediments in the Canadian Cordillera

Evidence for Late Holocene Earthquakes on the Utsalady Point Fault, Northern Puget Lowland, Washington

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