2003/03/01 by Timothy G. Fisher · 2 citations
Earth and Planetary Sciences · Environmental Science · #Geology and Paleoclimatology Research #Isotope Analysis in Ecology #Geological formations and processes
paper · doi:10.1016/s0033-5894(03)00011-5
openalex publication_date 2003/03/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/05/21
Abstract Sediment cores with new radiocarbon dates from the southern outlet of glacial Lake Agassiz indicate that meltwater delivery to the Mississippi valley was disrupted at 10,800 14 C yr B.P. and the outlet was abandoned by 9400 14 C yr B.P. These findings confirm the timing of generally accepted terminations of the Lockhart and Emerson Phases of Lake Agassiz. Additionally, the radiocarbon chronology indicates that the spillway was fully formed by 10,800 14 C yr B.P. and that the occupancy in late-Emerson time was likely short-lived with minimal spillway erosion.