Mammalian Biostratigraphy Across the Hemphillian--Blancan Boundary in Central Mexico

9316895米勒·皮，合作者奥斯卡·卡兰萨（墨西哥墨西哥大学）和一个专家小组将从墨西哥中部的关键地点收集和研究中新世-上新世的脊椎动物化石。他们将在这一时期的陆地记录中获得更高的年代地层精度，包括磁地层学，以及含化石序列中的火山灰床的辐射测年。这项研究将有助于确定包括南美移民在内的重要哺乳动物类群最早出现的日期，并为与北美其他地方类似的化石序列进行比较提供有价值的数据。

9316895 Miller PI, collaborator Oscar Carranza (UNAM, Mexico), and an assembled team of experts will collect and study Mio-Pliocene-age vertebrate fossils from key localities in central Mexico. They will obtain greater chronostratigraphic precision for this time period in the terrestrial record, including magnetostratigraphy, and radiometric dates from ash beds within the fossil-bearing sequences. This study will help date earliest occurrences of important mammalian taxa, including South American immigrants, and provide valuable data for comparisons with similar fossil-bearing sequences elsewhere in North America.