Response of surface processes to the Holocene landscape changes in Sonora: Evidences from the paleosol-sedimentary sequences at the archaeological sites Fin del Mundo and gramal

Ibarra-Arzave, G.; Solleiro-Rebolledo, E.; Sanchez, G.; Sedov, S.; Alexandra, G.; Morales, I.S.; Carpenter, J.; Chávez-Vergara, B.

Авторы: Ibarra-Arzave Georgina, Solleiro-Rebolledo Elizabeth, Sanchez Guadalupe, Sedov Sergey, Alexandra Golyeva, Morales Ismael Sanchez, Carpenter John, Chávez-Vergara Bruno
Журнал: Journal of South American Earth Sciences
Год издания: 2020
Издательство: Earth Sciences and Resources Institute
Местоположение издательства: United Kingdom
Номер статьи: 102947
DOI: 10.1016/j.jsames.2020.102947
Аннотация: Northern Mexico is predominantly composed of moderately developed red soils that provide evidence of weathering, rubification, neoformation of clay, and pedogenic carbonate accumulation. These soils constitute a pedological unit named San Rafael Paleosol (SRP) which were developed during the late Pleistocene (MIS 2) to the middle Holocene (15,000–4500 cal years BP). These paleosols can use as a chronologic marker at a regional scale. In this paper, we present a pedogenic interpretation of the paleosol-sedimentary processes during the late Quaternary, which contributes to the reconstruction of regional paleoenvironment. The development of SRP takes place over more than 15,000 years, and this pedogenesis is interrupted by stages of strong climatic instability, causing erosion of the SRP and sedimentation, presumably during the Altithermal. The records of La Playa show that SRP is buried by fluvial sediments, which include different facies. These sedimentation events are associated with the end of the Altithermal period and evidence more active geomorphic processes. These conditions are also observed at El Gramal, where dune sediments overly the SRP. This discontinuity evidence an intense erosional/sedimentation phase. In the particular case of El Fin del Mundo site, it is observed more mesic conditions as the water table rose, creating a wetland. Much of the synchronous variation in the morphology of the paleosols (pedofacies) can be explained by differences in local geomorphological conditions. These palaoesols developed under a semi-arid climate, slightly more humid than the present one with winter dominant rains and marked seasonal changes. These assumptions are supported by soil micromorphology, physical characteristics (color, grain size distribution) and composition of total organic and inorganic carbon. Additional paleoenvironmental information is also extracted from microbiomorphic analyses and diatoms assemblages from the one profile at El Fin del Mundo site.
Добавил в систему: Гольева Александра Амуриевна

	ИСТИНА	Войти в систему Регистрация
	Интеллектуальная Система Тематического Исследования НАукометрических данных
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

Интеллектуальная Система Тематического Исследования НАукометрических данных

Response of surface processes to the Holocene landscape changes in Sonora: Evidences from the paleosol-sedimentary sequences at the archaeological sites Fin del Mundo and gramalстатья

Прикрепленные файлы