Loess Deposits of Mississippi

Krinitzsky, E. L.; Turnbull, W. J.

doi:10.1130/spe94-p1

Cited by 25 publications

(15 citation statements)

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“…1a and 2a). Studies of LMV loess date from Lyell (1847) and continue to the present (e.g., Russell, 1944;Wascher et al, 1948;Krinitzsky and Turnbull, 1967;Miller et al, 1985;Follmer, 1996;Rutledge et al, 1996;Rodbell et al, 1997;Markewich et al, 1998a,b;Grimley et al, 2003;Markewich et al, 2011b). Data from many studies of inland aeolian deposits in the unglaciated USA have been discussed and summarized in articles such as Lancaster (2000), Muhs and Zárate (2001), Bettis et al (2003b), Busacca et al (2004) and Johnson (2013).…”

Section: Introductionmentioning

confidence: 93%

Synthesis on Quaternary aeolian research in the unglaciated eastern United States

Markewich

Litwin

Wysocki³

et al. 2015

Aeolian Research

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Section: Introductionmentioning

confidence: 93%

Synthesis on Quaternary aeolian research in the unglaciated eastern United States

Markewich

Litwin

Wysocki³

et al. 2015

Aeolian Research

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“…This definition is followed here. It has considerable in situ dry strength and excellent vertical slope stability if well drained and protected from rainwash (Krinitzsky & Turnbull 1966).…”

Section: Definitionsmentioning

confidence: 99%

Consolidation characteristics of some kate Pleistocene periglacial metastable soils of East Kent

Fookes

Best

1969

QJEGH

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Summary Metastable partially saturated soils are those which on wetting under load undergo a sudden decrease of void ratio, i.e. a structural collapse. One of the most important soils of this group is loess, a silty quartzose sediment of uniform grading. Loess has attracted interest in the past because of its unusual mode of formation associated with wind transport, and its unusual behaviour as an engineering material. It has extremely widespread occurrence outside Britain but only occurs to any extent in small areas in east Kent and has only been reported occasionally from elsewhere in Britain. The paper deals principally with the geotechnical and mineralogical characteristics of east Kent loess and some comparison is drawn with loess from various world-wide locations. The geotechnical behaviour supports the conclusions made from earlier geological observation which leave little room for doubt that the Kent loess is a true loess of periglacial origin. A coarser grained poorly sorted glacial solifluxion soil from Kent was also examined and found to be metastable. Because material of this type is fairly common this observation could have significant engineering implications.

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“…Many of these sites, most notably the Vicksburg and Natchez sites ( Fig. 2g and h, respectively), have been the subject of sedimentologic, ecologic, and faunal studies for decades (Wascher et al, 1947;Leighton and Willman, 1950;Leonard and Frye, 1960;Hubricht, 1963;Krinitzsky and Turnbull, 1967;Snowden and Priddy, 1968;Ruhe, 1984a,b;Pye and Johnson, 1988;Clark et al, 1989;McCraw and Autin, 1989;Markewich, 1993Markewich, , 1994Mirecki and Miller, 1994;Oches et al, 1996;Rodbell et al, 1997;Markewich et al, 1998;Oches and McCoy, 2001;Bettis et al, 2003).…”

Section: Methodsmentioning

confidence: 99%

Radiocarbon dating loess deposits in the Mississippi Valley using terrestrial gastropod shells (Polygyridae, Helicinidae, and Discidae)

et al. 2015

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a b s t r a c tSmall terrestrial gastropod shells (mainly Succineidae) have been used successfully to date late Quaternary loess deposits in Alaska and the Great Plains. However, Succineidae shells are less common in loess deposits in the Mississippi Valley compared to those of the Polygyridae, Helicinidae, and Discidae families. In this study, we conducted several tests to determine whether shells of these gastropods could provide reliable ages for loess deposits in the Mississippi Valley. Our results show that most of the taxa that we investigated incorporate small amounts (1-5%) of old carbon from limestone in their shells, meaning that they should yield ages that are accurate to within a few hundred years. In contrast, shells of the genus Mesodon (Mesodon elevatus and Mesodon zaletus) contain significant and variable amounts of old carbon, yielding ages that are up to a couple thousand 14 C years too old. Although terrestrial gastropod shells have tremendous potential for 14 C dating loess deposits throughout North America, we acknowledge that accuracy to within a few hundred years may not be sufficient for those interested in developing high-resolution loess chronologies. Even with this limitation, however, 14 C dating of terrestrial gastropod shells present in Mississippi Valley loess deposits may prove useful for researchers interested in processes that took place over multi-millennial timescales or in differentiating stratigraphic units that have significantly different ages but similar physical and geochemical properties. The results presented here may also be useful to researchers studying loess deposits outside North America that contain similar gastropod taxa. Published by Elsevier B.V.

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Loess Deposits of Mississippi

Cited by 25 publications

References 0 publications

Synthesis on Quaternary aeolian research in the unglaciated eastern United States

Synthesis on Quaternary aeolian research in the unglaciated eastern United States

Consolidation characteristics of some kate Pleistocene periglacial metastable soils of East Kent

Radiocarbon dating loess deposits in the Mississippi Valley using terrestrial gastropod shells (Polygyridae, Helicinidae, and Discidae)

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