The Southern Westerlies in Central Chile during the two last glacial cycles as documented by coastal aeolian sand deposits and intercalating palaeosols

Optical dating of loessic hillslope sediments constrains timing of prehistoric rockfalls, Christchurch, New Zealand

“…Similar observations have been made by various workers for different pIRIR signals (e.g. Buylaert et al ., ; Schatz et al ., ; Sohbati et al ., ; Tsukamoto et al ., ; Veit et al ., ; Li et al, ; Qiu and Zhou, ). In the second method, we followed a similar approach; three aliquots per sample were first bleached for 4 h in a Hönle SOL2 solar simulator.…”

Multi‐millennial scale climate variability during MIS 3 and MIS 2 inferred from luminescence dating of coastal sand dunes and buried paleosol sequences in central Chile, 32°S

“…Sand dunes have accumulated on top of each other during the Quaternary implying that phases of eolian activity are a recurrent component of the local geomorphic evolution. Intercalated buried paleosols reveal distinct time intervals when pedogenetic processes directly affected the eolian sand parent material (Fuenzalida, ; Paskoff, ; Veit et al , ). The factors that led to the formation of vast dune fields in central coastal Chile have long been a subject of debate (e.g.…”

“…pluvials) and that formation of soils upon dunes occurred as a result (Paskoff and Manríquez, ). Therefore, the occurrence of paleosols is linked to humid climate periods that interrupted extensive eolian morphogenesis in the region (Veit et al , ).…”

“…Red square inset marks the main map. Yellow stars represent the sites of Veit et al (), as much as ∼400 km from our study area. The main map shows the location of the three stratigraphic sites studied within the regional geomorphic context that includes present and ancient sand dune fields.…”

Landforms and processes in arid and semi-arid environments

“…They found that fluvial and alluvial processes were active in the early to mid-Quaternary, although modern river flow is rare and largely confined to the mountains in the north. To answer the fundamental scientific question about relationship between aeolian processes and global climate change, Veit et al (2015) present the first terrestrial record in Chile, consisting of coastal aeolian sand and dunes with intercalated palaeosols, covering the last 190 ka. On the basis of OSL chronology, they found that palaeosols formed in periods with stable surface conditions and a relatively dense vegetation cover, and sand accumulation occurred while aeolian activity increased under dry periods.…”