U.S.-Mexico Cooperative Research: Origin of Pliocene Bedded Cherts in Baja California Sur

9313828约翰逊美国计划奖将支持威廉姆斯学院地质学系的Markes E Johnson教授和墨西哥下加利福尼亚州自治大学的Jorge Ledesma Vazquez教授之间的研究合作。合作的目的是研究位于下加利福尼亚州康塞普西翁半岛底部的一系列小型沉积盆地中的地质构造之间的各种关系。先前的一次侦察调查显示，这些盆地中出人意料地存在广泛的层状硅质岩，初步的薄片揭示了恐鞭毛虫的微化石。研究人员打算验证这一理论，即一些地质构造代表了局部构造抬升时期，而其他地质构造，包括石灰岩和硅质岩，则代表了与海平面上升有关的海洋入侵事件。该合作将涉及来自威廉姆斯学院和UABC的本科生，从而为他们提供早期的研究经验。***

9313828 Johnson This Americas Program award will support a research collaboration between Prof. Markes E, Johnson of the Department of Geology of Williams College and Prof. Jorge Ledesma Vazquez of the Universidad Autonoma de Baja California (UABC) in Baja California, Mexico. The purpose of the collaboration is to study various relationships among geological formations located in a series of small sedimentary basins at the base of the Concepcion Peninsula in Baja California. A previous reconnaissance survey revealed the unexpected presence of widespread bedded cherts in these basins and preliminary thin sections expose microfossils of dinoflagelates. The researchers intend to test the theory that some of the geological formations represent periods of local tectonic uplift, while others, including limestones and cherts, represent episodes of marine incursion related to rising sea level. The collaboration will involve undergraduate students from Williams College and from UABC, thus providing them with an early research experience. ***