Dissertation Enhancement Grant: Middle Paleogene Palynology of Colombia, South America: Biostratigraphic, Sequence Stratigraphic, and Paleogeographic Implications

974122 Dilcher这项美洲计划论文增强赠款将资助Carlos Jaramillo先生在佛罗里达大学David Dilcher博士的指导下，对哥伦比亚安第斯山脉西部、东北部、中部和东部的四个安第斯省份的孢粉地层学和层序地层学进行研究。这项研究将包括对花粉/孢子进行详细的分类调查，并与现有的分类群进行比较。预计这项研究将为识别该地区古近纪的植物群成分提供数据，并完善现有的生物地层分辨率。主要目标是确定与海平面和基准面变化相关的孢粉响应模式，并将它们与进化变化区分开来。孢粉学(花粉/孢子)孢粉相的使用被证明是进行地质和植被重建的适当技术。这项研究将提供这一时期地质和植被发展的综合概述，并将为了解南美洲北部的古近纪历史提供关键联系。古近纪包括主要的演化进展，特别是在被子植物内部，以及全球环流和气候变化、海平面波动和构造作用的重大变化。然而，由于缺乏详细的地质研究，它在南美洲西北部的历史在很大程度上仍然不为人知。由于缺乏信息，对安第斯山脉隆起过程及其与该区域物种高度多样性的关系等重大大型事件的充分了解受到了阻碍。此外，该地区一些最重要的油气藏位于古近纪和始新世陆相岩石中，处于构造复杂程度较高的地区。对古近系地层学和生物地层学的深入了解，将促进这些油气藏的成功勘探。***

974122 Dilcher This Americas Program dissertation enhancement grant will fund Mr. Carlos Jaramillo, under the direction of Dr. David Dilcher, University of Florida, on a study of the palynostratigraphy and sequence stratigraphy of four Andean provinces in the western, northeastern, central and eastern Colombian Andes. The study will include a detailed taxonomic survey of pollen/spores and comparison with living taxa. It is anticipated that the research will provide data for recognizing flora constituents in the region during the Paleogene , as well as refine the existent biostratigraphic resolution. The main goal is to identify patterns of palynologic responses relative to sea-level and base-level changes, and distinguish them from evolutionary changes. The use of palynology (pollen/spores) palynofacies are proven and adequate techniques to make geological and vegetational reconstructions. The research will provide an integrated overview of the geological and vegetational development during this period, and will provide a critical link in the knowledge of the Paleogene history of northern South America. The Paleogene encompasses major evolutionary progress, especially within the angiosperms, and major changes in global circulation and climatic changes, sea-level fluctuations and tectonism. However, its history in northwestern South America remains largely unknown due to the scarcity of detailed geologic research. An adequate understanding of important large-scale events, such as the Andes uplift process and its relation to the high species diversity in the area, has been hindered by this lack of information. Furthermore, some of the most important hydrocarbon reservoirs in the region are located in Paleogene and Eocene continental rocks, in zones with high structural complexities. A better understanding of the paleogene stratigraphy and biostratigraphy will enhance the successful exploration of these reservoirs. ***