Last Glacial loess in the conterminous USA

Bettis, E. Arthur

doi:10.1016/s0277-3791(03)00169-0

Cited by 241 publications

(34 citation statements)

References 161 publications

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“…1). Loess accumulations in this area were deposited about the same time as their glaciogenic counterparts farther east (Martin, 1993;Muhs et al, 1999a;Roberts et al, 2003;Bettis et al, 2003a), but the sources of Great Plains loess are uncertain because neither the Laurentide nor Cordilleran ice sheets entered the headwaters of most rivers in the region.…”

Section: Introductionmentioning

confidence: 87%

“…Depending on the size and composition of airborne particles, as well as the albedo of the surface over which dust is being transported, eolian silt can have either a cooling or warming effect on the atmosphere (Harvey, 1988;Overpeck et al, 1996;Tegen, 2003;Bettis et al, 2003a;Roberts et al, 2003). Airborne dust can also have indirect effects on the atmosphere, such as cooling due to drawdown of atmospheric CO 2 via dustfertilized growth of phytoplankton in the ocean (Young et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

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Isotopic evidence for the diversity of late Quaternary loess in Nebraska: Glaciogenic and nonglaciogenic sources

Aleinikoff

Muhs

Bettis

et al. 2008

Geological Society of America Bulletin

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Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Isotopic evidence for the diversity of late Quaternary loess in Nebraska: Glaciogenic and nonglaciogenic sources

Aleinikoff

Muhs

Bettis

et al. 2008

Geological Society of America Bulletin

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“…However, the representation of loess is complicated, as it is often only a thin cover, which is ignored by the geological maps. No additional sources were used for this attribute, thus its coverage, compared to specialized maps focusing loess cover [e.g., Bettis et al, 2003;Haase et al, 2007;Pécsi, 1990;Zárate, 2003], is very restricted.…”

Section: A421 Specific Unconsolidated Sedimentsmentioning

confidence: 99%

The new global lithological map database GLiM: A representation of rock properties at the Earth surface

Hartmann

Moosdorf

2012

Geochem Geophys Geosyst

740

568

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[1] Lithology describes the geochemical, mineralogical, and physical properties of rocks. It plays a key role in many processes at the Earth surface, especially the fluxes of matter to soils, ecosystems, rivers, and oceans. Understanding these processes at the global scale requires a high resolution description of lithology. A new high resolution global lithological map (GLiM) was assembled from existing regional geological maps translated into lithological information with the help of regional literature. The GLiM represents the rock types of the Earth surface with 1,235,400 polygons. The lithological classification consists of three levels. The first level contains 16 lithological classes comparable to previously applied definitions in global lithological maps. The additional two levels contain 12 and 14 subclasses, respectively, which describe more specific rock attributes. According to the GLiM, the Earth is covered by 64% sediments (a third of which are carbonates), 13% metamorphics, 7% plutonics, and 6% volcanics, and 10% are covered by water or ice. The high resolution of the GLiM allows observation of regional lithological distributions which often vary from the global average. The GLiM enables regional analysis of Earth surface processes at global scales. A gridded version of the GLiM is available at the PANGEA Database (http://dx.doi.org/10.1594/ PANGAEA.788537).

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“…. Bettis et al (2003a) infer that loess deposition in western Iowa was in progress by no later than ca. 29,000 cal yr B.P.…”

Section: Chronology Of Peoria Loess Deposition In Nebraskamentioning

confidence: 99%

Origin and paleoclimatic significance of late Quaternary loess in Nebraska: Evidence from stratigraphy, chronology, sedimentology, and geochemistry

Muhs

Bettis

Aleinikoff

et al. 2008

Geological Society of America Bulletin

130

104

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Rachel, "Origin and paleoclimatic signifi cance of late Quaternary loess in Nebraska: Evidence from stratigraphy, chronology, sedimentology, and geochemistry" (2008 The spatial variability of particle size abundances in Peoria Loess shows a northwest-to-southeast fi ning in Nebraska, consistent with maps of previous workers that show a northwest-to-southeast thinning of loess. These observations indicate that paleowinds that deposited the loess were from the west or northwest and that the source or sources of Peoria Loess lay to the west or northwest.New mineralogical and geochemical data indicate that the most important sources of loess were likely Tertiary siltstones of the White River and Arikaree Groups, silt facies of Pliocene eolian sediments, and small contributions from Pierre Shale. It is likely that fi ne-grained silts were transported episodically through the Nebraska Sand Hills from

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Last Glacial loess in the conterminous USA

Cited by 241 publications

References 161 publications

Isotopic evidence for the diversity of late Quaternary loess in Nebraska: Glaciogenic and nonglaciogenic sources

Isotopic evidence for the diversity of late Quaternary loess in Nebraska: Glaciogenic and nonglaciogenic sources

The new global lithological map database GLiM: A representation of rock properties at the Earth surface

Origin and paleoclimatic significance of late Quaternary loess in Nebraska: Evidence from stratigraphy, chronology, sedimentology, and geochemistry

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