Landscape paleodynamics in siliciclastic domains with the use of phytoliths, sponge spicules and carbon isotopes: The case of southern Espinhaço Mountain Range, Minas Gerais, Brazil

Transient hillslope erosion in slow evolution landscapes

“…There are lines of evidence supporting important Quaternary fluctuations of precipitation, temperature, and vegetation in SE Brazil (Behling, 2002; Ledru et al, 2005; Salgado‐Labouriau et al, 1998), and in particular in the Espinhaço Range (Chueng et al, 2019; Silva et al, 2020). For example, precipitation has been shown to be strongly modulated by orbital fluctuations (Cruz et al, 2009; Wang et al, 2007), with some speleothem records suggesting a wetter climate starting at 70 ka (Cruz et al, 2009), a timing comparable to the transition time inferred from our inversion results.…”

“…There are lines of evidence supporting important Quaternary fluctuations of precipitation, temperature, and vegetation in SE Brazil (Behling, 2002;Ledru et al, 2005;Salgado-Labouriau et al, 1998), and in particular in the Espinhaço Range (Chueng et al, 2019;Silva et al, 2020). For example, precipitation has been…”

“…Nowadays, the climate of the Serra do Cipó Range is mesothermal, with mean annual temperature between 18°C and 19°C and mean annual precipitation ranging from 1250 to 1550 mm, with dry winters and wet summers. However, there are lines of evidence, from pedological and geomorphological records, that the region underwent many climatic changes during the Holocene and late Pleistocene, with occurrences of periods that were wetter and dryer than present‐day conditions (Barros & Magalhões Junior, 2020; Chueng et al, 2019; Silva et al, 2020).…”

“…Solid and dashed brown curves correspond to expectations for steady-state erosion and a constantly exposed surface, respectively. Production rates are calculated for the average conditions at the sampled sites in the Serra do Cip o (Figure 3), using a time-independent scaling scheme (Stone, 2000) [Color figure can be viewed at wileyonlinelibrary.com] Pleistocene, with occurrences of periods that were wetter and dryer than present-day conditions (Barros & Magalhões Junior, 2020;Chueng et al, 2019;Silva et al, 2020).…”

Reconstituição Paleoambiental Da Bacia Do Rio Grande (Ba), Por Meio Da Análise De Fitólitos E Luminescência Opticamente Estimulada (Loe)

“…O processo de evapotranspiração desses organismos vegetais permite que a solução se polimerize em diversas partes da planta (PIPERNO, 2006), gerando os fitólitos. Após a morte e/ou perda de partes da planta, esses restos se incorporam ao solo, onde a parte orgânica se decompõe e a parte mineral permanece na composição do solo, ficando sujeita ao ciclo da em: Alexandre et al (1999), Coe et al (2012aCoe et al ( , 2012bCoe et al ( , 2013Coe et al ( , 2015aCoe et al ( , 2015bCoe et al ( , 2017Coe et al ( , 2018, Calegari et al (2015), Barros et al (2016), Chueng (2016Chueng ( , 2020, Chueng et al (2018Chueng et al ( , 2019 IBGE, 2012).…”