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- Title
Evidence confirms an anthropic origin of Amazonian Dark Earths.
- Authors
Lombardo, Umberto; Arroyo-Kalin, Manuel; Schmidt, Morgan; Huisman, Hans; Lima, Helena P.; de Paula Moraes, Claide; Neves, Eduardo G.; Clement, Charles R.; Aires da Fonseca, João; de Almeida, Fernando Ozorio; Vieira Alho, Carlos Francisco Brazão; Bronk Ramsey, Christopher; Brown, George G.; Cavallini, Marta S.; Lima da Costa, Marcondes; Cunha, Luís; dos Anjos, Lúcia Helena C.; Denevan, William M.; Fausto, Carlos; Fernandes Caromano, Caroline
- Abstract
B arising from b Silva et al. I Nature Communications i https://doi.org/10.1038/s41467-020-20184-2 (2021) First described over 120 years ago in Brazil, Amazonian Dark Earths (ADEs) are expanses of dark soil that are exceptionally fertile and contain large quantities of archaeological artefacts. 1C), the modern Ca:P ratio in ADEs is the result of differential preservation coupled with the specific tropical soil dynamics of Ca, which is easily leached, and P, which binds with soil Fe and Al oxides[28]. The Ca/Sr ratio in ADE is close to that of wood ash, suggesting an anthropogenic origin for Sr, while Solimões sediments have overall much higher values.
- Subjects
SCIENTIFIC knowledge; SOIL micromorphology; ANTHROPOGENIC soils; BLACK cotton soil; SOIL profiles
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-31064-2