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loess

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Series: GSA Field Guides
Published: 01 January 2017
DOI: 10.1130/2017.0049(09)
EISBN: 9780813756493
... influenced by multiple Quaternary glacial outburst megafloods. These floods produced expansive fine-grained sediments that were subsequently remobilized by the wind to generate sand dunes, sand sheets, and the thick loess of the Palouse. Landforms and deposits that date from the Last Glacial Maximum (LGM...
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Series: Geological Society, London, Special Publications
Published: 01 January 2016
DOI: 10.1144/SP417.5
EISBN: 9781862397125
... Abstract Loess is wind-blown sediment that covers extensive areas in the middle latitudes. Much of the loess in Eastern and Central–Eastern Europe has been redeposited by the River Danube and its tributaries. The case study area (Vojvodina region) encompasses the confluence area of the Danube...
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Journal Article
Published: 01 November 2014
Environmental and Engineering Geoscience (2014) 20 (4): 405.
Series: GSA Field Guide
Published: 01 January 2014
DOI: 10.1130/2014.0036(02)
EISBN: 9780813756363
... Abstract This field guide describes four exposures of glacigenic sediment along the Missouri River bluffs east of Omaha, Nebraska. Field trip stops include Loveland, Iowa, which is the type section of the Loveland Silt and Pisgah Formation (Illinoian and Early Wisconsinan loess) and Crescent...
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Series: GSA Special Papers
Published: 01 May 2012
DOI: 10.1130/2012.2487(06)
... Single-step, laser-fusion 40 Ar/ 39 Ar ages of single muscovite grains with an automated micro-extraction system is a precise and relatively rapid way of analyzing large numbers of grains. This study used >500 muscovite grains from a late Wisconsinan sandy loess from eastern Long Island...
Series: GSA Special Papers
Published: 01 January 2011
DOI: 10.1130/2011.2473(08)
... Pollen and lithopedological data were obtained from Upper Paleolithic sites and Upper Pleistocene loess-soil sequences located between the Sea of Azov and the River Donets, and in the foothills of the Crimean Mountains. During the last Middle Pleniglacial interstadial (Upper Vytachiv soil, 30...
Series: GSA Special Papers
Published: 01 January 2011
DOI: 10.1130/2011.2473(09)
Published: 01 January 2009
DOI: 10.1130/2009.monitoring(01)
EISBN: 9780813759432
.... Aeolian deposits—silt and clay size. Deposits of wind-transported, silt-sized quartz particles, termed loess, cover as much as 10% of Earth's land surface. Loess deposits are widespread in areas of northern China, southern central Asia, central Europe, Argentina, Alaska, and the central United States...
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Series: GSA Field Guide
Published: 01 January 2008
DOI: 10.1130/2008.fld012(07)
EISBN: 9780813756127
...: one of the older parts of the Evansville metropolitan complex. In the mid-nineteenth century, this prominent loess-mantled, bedrock-cored hill was known as coal-mine hill for shaft mines that were worked here. After construction of the Reitz School building was completed near its crest in 1918...
Journal Article
Published: 01 April 2006
Clays and Clay Minerals (2006) 54 (2): 266-273.
...Junfeng Ji; Liang Zhao; William Balsam; Jun Chen; Tao Wu; Lianwen Liu Abstract Chlorite is one of the most common Fe-bearing minerals and is susceptible to weathering in loess and soils. The conventional method for analyzing chlorite, based on XRD with the Rietveld technique, is quantitative...
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Journal Article
Published: 01 April 2002
Clays and Clay Minerals (2002) 50 (2): 208-216.
...Junfeng Ji; William Balsam; Jun Chen; Lianwen Liu Abstract The long, continuous deposition of dust in the Chinese loess plateau offers a unique opportunity to study the nature of Fe oxide formation in a wide range of climatic conditions. A technique to obtain quantitative estimates...
FIGURES
Series: GSA Reviews in Engineering Geology
Published: 01 January 2002
DOI: 10.1130/REG15-p149
EISBN: 9780813758152
... On March 7, 1983, a catastrophic landslide occurred in Dongxiang county, Gansu Province, in the Loess Plateau of China. The geographic coordinates of the landslide are 105°35′10″E, 35°33′40″N ( Fig. 1 ). The peak and the steep south slope of Sale Mountain slipped suddenly: after sliding...
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Journal Article
Journal: GSA Bulletin
Published: 01 October 2000
GSA Bulletin (2000) 112 (10): 1475-1495.
...David A. Grimley Abstract The relative contributions of various glacial and nonglacial sediments to Wisconsin Episode loess units along the lower Illinois and central Mississippi Valleys are estimated on the basis of a comparison of magnetic susceptibility and silt and clay mineralogy...
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Journal Article
Published: 01 June 2000
Canadian Journal of Earth Sciences (2000) 37 (6): 863-877.
... named the Midnight Dome gravel. This gravel is mantled by 15 m of loess and hillslope deposits, named the Midnight Dome loess, which preserve at least three interglacial pollen assemblages, and a reverse-normal-reverse-normal polarity sequence assigned to the late Matuyama chron, including Jaramillo...
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Journal Article
Published: 01 May 2000
Canadian Journal of Earth Sciences (2000) 37 (5): 831-848.
... records. However, the cold period in the ocean data (δ 18 O) is very subdued relative to terrestrial records. Additionally, over the last 200 ka, periods of minimum insolation intensity do not correspond linearly to periods of maximum grain-size and ice volume variations revealed in the loess and ocean...
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Journal Article
Published: 03 April 2000
Canadian Journal of Earth Sciences (2000) 37 (4): 621-627.
...John A. Westgate; Shari J. Preece; Erica Kotler; Sheila Hall Abstract Dawson tephra is the most prominent tephra bed in the Quaternary deposits of the Klondike and Sixtymile areas of the Yukon. It occurs in organic-rich, reworked, Late Wisconsinan loess deposits that occupy valley-bottom sites...
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Journal Article
Journal: GSA Bulletin
Published: 01 March 2000
GSA Bulletin (2000) 112 (3): 375-393.
... tilting. Rates of tilting inferred from luminescence dating of interbedded loess have been remarkably rapid (∼10 −8 rad/yr). Similarly rapid rates of Holocene differential rock uplift are inferred from tilted lacustrine sediments in the southwestern part of the range. The range is bounded on the west...
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Journal Article
Journal: GSA Bulletin
Published: 01 February 2000
GSA Bulletin (2000) 112 (2): 221-235.
... summarizes a model for evolution of channel courses in the Western and Eastern Lowlands during the Illinoian and Wisconsin glacial stages. For the Western Lowlands, stratigraphic relations between loess units and subjacent fluvial deposits show that major continuous terrace surfaces, or valley trains...
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Journal Article
Published: 01 January 2000
Canadian Journal of Earth Sciences (2000) 36 (10): 1645-1654.
... grains sont libérés de la roche-mère, ils donnent surtout des sédiments de la taille des limons et en moindre abondance des sables et des argiles. Ce matériel recouvre le replat des terrasses de cryoplanation et constitue une source potentielle de lœss pendant les périodes glaciaires. L’analyse des eaux...
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Journal Article
Journal: GSA Bulletin
Published: 01 December 1999
GSA Bulletin (1999) 111 (12): 1861-1875.
...Daniel R. Muhs; John N. Aleinikoff; Thomas W. Stafford, Jr; Rolf Kihl; Josh Been; Shannon A. Mahan; Scott Cowherd Abstract Loess in eastern Colorado covers an estimated 14 000 km 2 , and is the westernmost part of the North American midcontinent loess province. Stratigraphic studies indicate...