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Late Pleistocene paleoenvironment at a Middle Stone Age archaeological site in Equatorial Guinea: a paleopedological approachстатья Исследовательская статья
- Авторы: Cruz-y-Cruz Tamara, Terrazas-Mata Alejandro, Pogosyan Lilit, Sedov Sergey, Pi-Puig Teresa, Rivera-González Iran, Menéndez-Iglesias Beatriz, Rodríguez-Rivas Jorge, Cabadas-Báez Héctor
- Журнал: Boletin de la Sociedad Geologica Mexicana
- Том: 74
- Номер: 3
- Год издания: 2022
- Издательство: Sociedad Geologica Mexicana
- Местоположение издательства: Mexico
- Первая страница: 1
- Последняя страница: 30
- DOI: 10.18268/BSGM2022v74n3a200622
- Аннотация: http://boletinsgm.igeolcu.unam.mx/bsgm/index.php/volumenes-volumes?id=2463Key evidence of human occupation in Africa during the Middle Palaeolithic (Middle Stone Age [MSA]) is available from the south and east of the continent, where semi-arid climate prevails. Rare evidence of MSA human occupation in the humid tropical region was recently reported from Equatorial Guinea. To identify if paleo-lithic human occupation occurred in the tropical forest, the stratigraphy of the recently discovered archaeological site “Mabewele I” was analyzed using a paleopedological approach. The proper-ties evaluated along a vertical profile are: gran-ulometry, magnetic susceptibility (K), free iron extractable with sodium dithionite (Fed), total organic carbon (TOC), chemical composition by X-ray fluorescence (XRF), X-ray diffraction mineralogy (XRD), ternary plot of the three main oxides (SiO2-Al2O3-Fe2O3), phytoliths and micromorphology. The predominant fraction is sand, with a significant clay content (> 30 %). The K and the Fed presented low values, as well as the TOC. XRF showed few variations along the sequence and XRD showed that the clays are mainly kaolinites, with a very low component of vermiculites. The phytoliths correspond to trop-ical vegetation with few changes in the vegetal composition between the deep and superficial zones. A charcoal from the lower part of the profile was dated between 12.57-12.24 ka cal BP, while the main artifact horizon was located at the bottom. The analytical results appear contradictory: on the one hand, there is evidence of intense chemical weathering under a humid tropical climate, but the clay cutans in the pores are very scarce and incipient and the iron nod-ules are mostly anorthic. This indicates that the sequence is composed of pedosediments associ-ated with a high environmental dynamism, with short periods of erosion-sedimentation-pedo-genesis. The results allow us to propose that humans inhabited the tropical forest during the MSA and that erosion-sedimentation processes could be related to anthropization processes.
- Добавил в систему: Погосян Лилит Аветовна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | A200622_Cruz2.pdf | 5,1 МБ | 19 августа 2022 [LilitPogosyan] |