Paleontology and Geochronology of the Middle Miocene of South America

南美洲中新世地层在一些地方蕴藏着丰富的脊椎动物化石，包括新大陆猴子进化的重要记录。理查德·凯博士建议通过在哥伦比亚和阿根廷的实地考察，扩大他对智利中新世脊椎动物的成功研究。拟议在哥伦比亚进行的研究将提供有关中新世南美洲热带森林动物群的重要新信息。他的研究团队将包括几位专门研究地区和非地区地质年代学的美国科学家。灵长类动物化石，以及一些。国家的合作者。提议的inter。国际性的学科研究项目将具有广泛的意义。几个南美国家的人将获得最新的磁振子方法的经验。地层学和同位素年代测定。新的化石发现可能会揭示新世界脊椎动物谱系的进化史。这些化石将提供迄今为止南美洲动物的最佳视角，在大约300万年前，随着巴拿马地峡的崛起，南北美洲相互交流之前。这个项目的结果将引起哺乳学家、人类学家、兴趣广泛的地质学家、生物地理学家和进化生物学家的兴趣。

The Miocene strata in South America contain rich deposits of fossil vertebrates in places, including an important record of monkey evolution in the New World. Dr. Richard Kay proposes to expand his successful research on the Miocene vertebrates of Chile through field work in Colombia and Argentina. The proposed research in Colombia will provide important new information concerning the tropical forest fauna of South America during the Miocene. His research team will include several U.S. scientists specializing on geochronology of the regions and non.primate fossils, as well as several in.country collaborators. The proposed inter.disciplinary international research project will have wide implications. Several South American nationals will gain experience in the latest approaches to magneto.stratigraphy and isotopic age dating. New fossil discoveries may shed light on the evolutionary history of New World vertebrate lineages. These fossils will provide the best view to date of the South American fauna prior to the interchange between North and South America approximately 3 millino years ago, following the rise of the Panamanian Isthmus. Results from this project will be of interest to mammalogists, anthropologists, geologists with many interests, biogeographers, and evolutionary biologists.