2005/12/01 by Sarah C. Sherlock, Simon P. Kelley, John Parnell +4 · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #Archaeology #Astro and Planetary Science #Astrobiology #Basement #Context (archaeology) #Geography #Geology #Geology and Paleoclimatology Research #Impact crater #Impact structure #Paleontology #Planetary Science and Exploration
paper · doi:10.1111/j.1945-5100.2005.tb00146.x
openalex publication_date 2005/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/02
Abstract— We have re-evaluated the published age information for the Haughton impact structure, which was believed to have formed ˜23 Ma ago during the Miocene age, and report new Ar/Ar laser probe data from shocked basement clasts. This reveals an Eocene age, which is at odds with the published Miocene stratigraphic, apatite fission track and Ar/Ar data; we discuss our new data within this context. We have found that the age of the Haughton impact structure is ˜39 Ma, which has implications for both crater recolonization models and post-impact hydrothermal activity. Future work on the relationship between flora and fauna within the crater, and others at high latitude, may resolve this paradox.