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outwash

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Series: GSA Special Papers
Published: 07 April 2021
DOI: 10.1130/2020.2548(10)
EISBN: 9780813795485
... exposures, and compact massive diamict exists in one exposure. This sediment is interpreted as proglacial outwash and subglacial till. Most moraine sediment shows deformation structures (e.g., smaller and larger folds), and some units contain evidence of water escape. Other units maintain their original...
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Journal Article
Journal: Geology
Published: 29 May 2020
Geology (2020) 48 (9): 867–871.
... carbon, and gravel-sized charcoal particles are common on the outwash plain in front of the crater. The organic matter is depleted in the thermally sensitive, labile bio-macromolecule proto-hydrocarbons. Pebble-sized lumps of lignite collected close to the sand sample consist largely of fragments...
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Journal Article
Published: 30 July 2019
Journal of the Geological Society (2019) 176 (6): 1169–1181.
... that the present limits of loess are probably close to their original boundaries. The past proximity of the British Ice Sheet, the accumulation of dusty sediments coating north-facing cliffs of Brittany originating in the outwash of the British–Irish Ice Sheet and in the palaeo-rivers of the English Channel...
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Journal Article
Published: 01 July 2019
The Journal of Geology (2019) 127 (4): 411–435.
... and 5Coxb represent moraine sediment deposited sometime in the Early Pleistocene, with the lowermost horizon, 6Coxbm, depicting an earlier glaciation, possibly even of Late Pliocene age. Lithologic units of moraine and outwash in units 2 and 3 formed in the middle to Upper Matuyama, with precise dating...
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Series: GSA Field Guide
Published: 10 December 2018
DOI: 10.1130/2018.0051(07)
EISBN: 9780813756516
.... The modern-day course of the Ohio River was incised after the pre−Illinois Episode, and then aggraded with transportation of Illinois Episode glacial outwash. Deposition of outwash at the mouths of tributaries caused impoundment and slackwater deposition in tributary valleys; the Claryville Clay has long...
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Series: GSA Field Guide
Published: 10 December 2018
DOI: 10.1130/2018.0051(11)
EISBN: 9780813756516
... [Illinois Episode]) have been the focus of recent stratigraphic and chronologic investigation. New radiocarbon and optically stimulated luminescence (OSL) dating from outcrop and core has refined the timing of OIS 2 and OIS 6 ice sheet advances, outwash/slackwater aggradation, glacial lake formation...
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Series: GSA Field Guide
Published: 10 December 2018
DOI: 10.1130/2018.0051(06)
EISBN: 9780813756516
...) is a U.S. EPA–designated sole-source aquifer for most of the ~2.3 million residents of the Great Miami River basin. The aquifer system is similar to many of the glacial outwash–alluvial aquifers found throughout the southern Midwestern United States: a valley deeply incised into bedrock by meltwater from...
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Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP435.6
EISBN: 9781786202901
... as subglacial channel-fills to ice-proximal proglacial outwash fans ( Fig. 2 ) ( Hirst et al. 2002 ; Dixon et al. 2008 ; Hirst 2012 ). FA2 (massive to low-angle cross-laminated, dewatered sandstones) are more common towards the top of glacial valley fills and in strata that overtops the valleys to form...
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Journal Article
Published: 01 February 2016
Earthquake Spectra (2016) 32 (1): 143–169.
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Series: GSA Special Papers
Published: 01 January 2016
DOI: 10.1130/2015.2516(20)
... with thick deposits of coarse- and fine-grained alluvium prior to 350 ka, during the major glacial phase of MIS 12. During the cold stages that followed MIS 12, ice was less extensive and limited to the Orjen plateau, and there is little evidence of outwash deposition during these later glaciations. Surface...
Series: GSA Field Guide
Published: 01 January 2014
DOI: 10.1130/2014.0038(07)
EISBN: 9780813756387
..., Breccia, and Outwash Sediments Stop 1-3: Southeast Tricouni Ice-Contact Lavas Stop 3-3: (42-42.8 km) Hot Debris Flow Unit End of Day 3: Discussion Evolution of a Pyroclastic Dam Durations of Dam Building and Lake Filling End of Day 2: Discussion Day 3: The Effusive Phase of the 2360...
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Series: GSA Field Guide
Published: 01 January 2014
DOI: 10.1130/2014.0037(09)
EISBN: 9780813756370
.... Description of Stops Stop 1. Mallards Rest Fishing Access (45.4860° N, 110.6218° W) Figure 5. Pinedale end moraines and outwash fan of the northern Yellowstone outlet glacier, showing preservation of detailed braided channel pattern (from Pierce, 1979 ; photograph by U.S. Geological Survey taken...
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Journal Article
Published: 01 May 2013
Environmental & Engineering Geoscience (2013) 19 (2): 99–114.
...NATHANIEL R. SWANSON; PAUL M. SANTI Abstract Colluvium and debris-flow deposits differ from each other and from glacial till and glacial outwash deposits in Durango, CO, in terms of sedimentological properties evaluated using laboratory testing. Testing included grain-size analysis, Atterberg...
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Journal Article
Journal: GeoArabia
Publisher: Gulf Petrolink
Published: 01 January 2013
GeoArabia (2013) 18 (1): 97–134.
... valley systems. In the Unayzah C, subsurface isopach mapping suggests down-valley transport from the north, implying that at least some of the ice was situated in localized, upland (alpine) ice caps. Multiple phases of glacial advance and retreat occurred. Glacial outwash sands and gravels (representing...
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Series: GSA Special Papers
Published: 01 December 2011
DOI: 10.1130/2011.2483(20)
... generated outwash flood resulting in a sandur, or sheet of outwash sands and gravel). We imaged unconsolidated sediment particles in situ at about hand lens scale and documented their characteristics at six sites along the sandur. Average particle size and number of angular, very angular, and subangular...
Journal Article
Journal: GSA Bulletin
Published: 01 July 2011
GSA Bulletin (2011) 123 (7-8): 1478–1496.
... to have been derived from the underlying till by water that flowed through a subglacial conduit (R-channel), within which the narrow gravelly central ridge was deposited. Most mud and finer sand bypassed the conduit and was deposited proglacially on the floor of the Champlain Sea, first as sandy outwash...
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Journal Article
Journal: Geology
Published: 01 February 2011
Geology (2011) 39 (2): 103–106.
... on outwash terraces can be directly dated to determine the timing of early–middle Quaternary glacial advances in southern South America. Cosmogenic 10 Be and 26 Al surface exposure ages were obtained from outwash gravels associated with two of the oldest glacial sequences in the Lago Pueyrredón valley (47.5...
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Journal Article
Published: 01 July 2009
Journal of Sedimentary Research (2009) 79 (7): 495–522.
... the onlap contact potentially record a proximal outwash plain that might have developed as the ice retreated into ancestral Unaweep Canyon. If so, then frequent moderate to high-magnitude floods originating either directly from glacial melt or from a ponded system located within ancestral Unaweep Canyon...
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Journal Article
Journal: Geology
Published: 01 January 2009
Geology (2009) 37 (1): 3–6.
... and dated samples from the Fiordland continental margin. These rates are derived from dextral displacements of relict but well-preserved glacial geomorphology (moraines and outwash fans), interpreted to 17 (+2/−1, calendar) ka. The weighted mean slip rate is 27.2 (−3.0/+1.8) mm/yr on the shelf between...
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Series: GSA Special Papers
Published: 01 January 2009
DOI: 10.1130/2009.2460(02)