TY - JOUR
T1 - Evidence of Holocene climatic changes from aeolian deposits in Baja California Sur, Mexico
AU - Murillo De Nava, Janette M.
AU - Gorsline, Donn S.
AU - Goodfriend, Glenn A.
AU - Vlasov, V. K.
AU - Cruz-Orozco, Rodolfo
N1 - Funding Information:
This paper is a contribution to IGCP Project 367, Late Quaternary Coastal Records of Rapid Change: Application to Present and Future Conditions. This work has been supported by the Union PaciÞc Oil Company, Nacional Science Foundation, CONACYT, and the University of Southern California (USC). Centro Inter-disciplinario de Ciencias Marinas (CICIMAR) and Universidad Auto« noma de Baja California Sur (UABCS) provided logistic support. We thank the researchers of CICIMAR and UABCS who participated in the Þeld trips, specially Dr. Enrique H. Nava-Sanchez. Dr. Y.A. Sapohnikov for his collaboration in the communication with the Lomonosov laboratory researchers. Drs. D. Price, O.A. Kulikov, O.V. Kiryukhin are acknowledged for the hard work of TL dating.
PY - 1999/5
Y1 - 1999/5
N2 - Well-defined Late Pleistocene and Holocene dune fields are present on the surface of the Purisima-Iray Magdalena sedimentary basin and on top of barrier islands of the Magdalena Lagoonal Complex in Baja California Sur, Mexico. Thermoluminescence, amino acid epimerization, and radiocarbon techniques were used for dating dune sands and shell samples respectively. During Late Pleistocene to early Holocene (14 to 8 ka BP) mega-barchans and linear dunes were formed. During early Holocene through middle Holocene (warm-dry climate) dune fields were still active. At about 5 to 6 ka BP the stabilization of sea level developed the present lagoonal system in the area. Sandy barrier islands capped by foredunes were developed. At this time coastal dunes were eroded, and in part inundated, forming large flooding flats and sabkha deposits in the old inter-dune areas. During late Holocene, after the lagoonal system was fully developed, dunes were emplaced along the lagoonal coasts. The presence of some younger dates in older deposits seems to represent dune reactivation.
AB - Well-defined Late Pleistocene and Holocene dune fields are present on the surface of the Purisima-Iray Magdalena sedimentary basin and on top of barrier islands of the Magdalena Lagoonal Complex in Baja California Sur, Mexico. Thermoluminescence, amino acid epimerization, and radiocarbon techniques were used for dating dune sands and shell samples respectively. During Late Pleistocene to early Holocene (14 to 8 ka BP) mega-barchans and linear dunes were formed. During early Holocene through middle Holocene (warm-dry climate) dune fields were still active. At about 5 to 6 ka BP the stabilization of sea level developed the present lagoonal system in the area. Sandy barrier islands capped by foredunes were developed. At this time coastal dunes were eroded, and in part inundated, forming large flooding flats and sabkha deposits in the old inter-dune areas. During late Holocene, after the lagoonal system was fully developed, dunes were emplaced along the lagoonal coasts. The presence of some younger dates in older deposits seems to represent dune reactivation.
UR - http://www.scopus.com/inward/record.url?scp=0032771709&partnerID=8YFLogxK
U2 - 10.1016/S1040-6182(98)00035-4
DO - 10.1016/S1040-6182(98)00035-4
M3 - Artículo
SN - 1040-6182
VL - 56
SP - 141
EP - 154
JO - Quaternary International
JF - Quaternary International
IS - 1
ER -