expanded abstract introduction in general, loess sediments are one of the most widespread forms of eolian sediments. during the past few decades, loess stratigraphy studies played key role in global climate changes. these sediments are usually yellowish in color and silt makes 70 to 90 percent of it volume. in iran, loesses outcrop often in northeast of south caspian sea. the previous studies r...

Many soils have clay-enriched horizons that are thought to result from pedogenic processes. Various hypotheses are proposed for expected clay size-distributions in soil profiles. The average size of clay crystallites determined by the amount of broadening of x-ray diffraction peaks ranged from 160 to >2000A 0 , but the lack of trends in four loess-de• rived soils did not permit the hypotheses t...

Central Asia is one of the most significant loess regions on Earth, with an important role in understanding Quaternary climate and environmental change. However, in contrast to the widely investigated loess deposits in the Chinese Loess Plateau, the Central Asian loess-paleosol sequences are still insufficiently known and poorly understood. Through field investigation and review of the previous...

Loess may be integrated into slope deposits at different soil depths and influence related physical, chemical mineralogical properties. Therefore, tracking the border between deposited loess underlying materials estimating depth of penetration is a challenge. Five soils from Lower Silesia province in south-western Poland having types geologic substrate being covered by various thicknesses were ...

Fleas Xenopsylla conformis mycerini and Xenopsylla ramesis replace each other on the same rodent host (Meriones crassus) in two habitats that differ in substrate texture (sand and loess-like sediments, respectively). We hypothesized that the substrate is an important factor determining flea distribution and studied survival of larvae, pupae and newly emerged adults as well as the rate of pre-im...

Recent stratigraphic studies in central Alaska have yielded the unexpected finding that there is little evidence for full-glacial (late Wisconsin) loess deposition. Because the loess record of western Alaska is poorly exposed and not well known, we analyzed a core from Zagoskin Lake, a maar lake on St. Michael Island, to determine if a full-glacial eolian record could be found in that region. P...

in order to study the effects of climate and geomorphology on the development of soils and their physico-chemical peroperties, two transects on the loess parent material were selected in two regions of golestanprovince. the regions were: huttan (maraveh tappeh area) and gorgan with aridic-thermic and xeric-thermic soil moisture and temperature regimes, respectively. four pedons in hutan and fiv...

MOTIVATION Our goal was to develop a normalization technique that yields results similar to cyclic loess normalization and with speed comparable to quantile normalization. RESULTS Fastlo yields normalized values similar to cyclic loess and quantile normalization and is fast; it is at least an order of magnitude faster than cyclic loess and approaches the speed of quantile normalization. Furth...