Luminescence dating accuracy

(Liu TS, Loess and the environment) Much effort was put into the setting up of regional and local loess stratigraphies and their correlation (Kukla 1970, 1975, 1977).But even the chronostratigraphical position of the last interglacial soil correlating to marine isotope substage 5e has been a matter of debate, owing to the lack of robust and reliable numerical dating, as summarized for example in Zöller et al.This soil has a characteristic called vertical cleavage which makes it easily excavated to form cave dwellings, a popular method of making human habitations in some parts of China. In several areas of the world, loess ridges have formed that are aligned with the prevailing winds during the last glacial maximum.

The largest deposit of loess in the United States, the Loess Hills along the border of Iowa and Nebraska, has survived intensive farming and poor farming practices.

The term "Löß" was first described in Central Europe by Karl Cäsar von Leonhard (1823–1824) A tremendous number of papers have been published since then, focusing on the formation of loess and on loess/palaeosol (older soil buried under deposits) sequences as archives of climate and environment change.

These water conservation works were carried out extensively in China and the research of Loess in China has been continued since 1954.

Loess grains are angular with little polishing or rounding and composed of crystals of quartz, feldspar, mica and other minerals. Loess deposits may become very thick; more than a hundred meters in areas of China and tens of meters in parts of the Midwestern United States.

It generally occurs as a blanket deposit that covers areas of hundreds of square kilometers and tens of meters thick.

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Relative to the pampean loess the neotropical loess is poor in quartz and calcium carbonate.

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